Tag Archives: vaccines

U.N.’s Guterres calls for $35 billion more for WHO COVID-19 program

ZURICH (Reuters) – United Nations Secretary General Antonio Guterres called for $35 billion more, including $15 billion in the next three months, for the World Health Organization’s (WHO) “ACT Accelerator” program to back vaccines, treatments and diagnostics against COVID-19.

Some $3 billion has been contributed so far, Guterres told an online event on Thursday, calling it “seed funding” that was less than 10% of what the WHO wants for the program, formally called Access to COVID-19 Tools (ACT) Accelerator.

Financial support has, so far, lagged goals, as nations or governments including the European Union, Britain, Japan and the United States reach bilateral deals for vaccines, prompting Guterres and WHO General Director Tedros Adhanom Ghebreyesus to plead to nations to contribute.

“We now need $35 billion more to go from ‘start up’ to ‘scale up and impact’,” Guterres said in online remarks at a meeting of a council formed to help the ACT Accelerator gain traction. “There is real urgency in these numbers. Without an infusion of $15 billion over the next three months, beginning immediately, we will lose the window of opportunity.”

European Commission President Ursula von der Leyen pledged backing, having in August already promised 400 million euros ($474 million) to the COVAX vaccine portion of the program.

“It is difficult to find a more compelling investment case. The European Commission will remain deeply and entirely committed to the success of the ACT Accelerator,” von der Leyen said. “The world needs it, we all need it.”

Tedros renewed calls for scaling up COVID-19 clinical trials. AstraZeneca this week suspended late-stage trials on its potential vaccine after an illness in a participant in Britain. Chief Executive Pascal Soriot said on Thursday if safety reviewers allow a restart, the company should still know by year’s end if its vaccine works.

(Reporting by John Miller; Editing by Michael Shields)

Severe COVID-19 riskier than heart attack for young adults; antibiotic shows no benefit

By Nancy Lapid

(Reuters) – The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus.

More young adults survive heart attacks than severe COVID-19

Among COVID-19 patients treated at 419 U.S. hospitals from April through June, only about 5% were ages 18 to 34. But that group had “substantial rates of adverse outcomes,” according to a report on Wednesday in JAMA Internal Medicine. Roughly one in five needed intensive care, one in 10 needed mechanical ventilation, and nearly 3% died. While the mortality rate is lower than in older adults, it is roughly double the death rate of young adults from heart attacks, the authors say. Obesity, high blood pressure, and diabetes were tied to higher risk for adverse events. For young adults with more than one of these conditions, the risk of a bad outcome was similar to middle-aged adults without the risk factors. More than half of hospitalized young adults were Black or Hispanic, “consistent with prior findings of disproportionate illness severity in these demographic groups,” the authors said. “Given the sharply rising rates of COVID-19 infection in young adults, these findings underscore the importance of infection prevention measures in this age group,” the concluded.

Antibiotic fails to help hospitalized COVID-19 patients

The antibiotic azithromycin did not appear to provide any benefit to hospitalized COVID-19 patients who were having trouble breathing, according to a study in Brazil. At 57 hospitals, 243 COVID-19 patients who needed oxygen or mechanical ventilation were randomly assigned to receive azithromycin, while 183 similar patients did not get the antibiotic. All received other standard treatment, which in Brazil included hydroxychloroquine, a malaria drug that other studies have shown provides little or no benefit. While azithromycin did not appear to do any harm, after 15 days it was not associated with any patient improvement nor did it reduce their risk of death. In an April survey of more than 6,000 physicians in 30 countries, azithromycin was the second most commonly prescribed treatment for COVID-19, the study investigators wrote in The Lancet medical journal. The absence of any benefit in this new study “suggests that the routine use of this strategy should be avoided,” they said.

Risk of catching COVID-19 while hospitalized can be low

Among nearly 8,500 patients admitted to a large Boston hospital between early March and the end of May, only two became sick with coronavirus infections that may have been acquired while they were hospitalized, doctors report. One likely was infected by a spouse who initially appeared well during daily visits but who developed symptoms while the patient was still hospitalized. That was before visitor restrictions and universal masking rules had been implemented. The other patient developed symptoms four days after leaving the hospital. The source of the infection is not known. According to a paper published on Wednesday in JAMA Network Open, infection control efforts at the hospital included dedicated COVID-19 units with airborne infection isolation rooms, personal protective equipment for staff and monitoring to make sure those were used correctly, universal masking, visitor restriction, and liberal COVID-19 testing of symptomatic and asymptomatic patients. These “robust and rigorous infection control practices may be associated with minimized risk” of COVID-19 spreading through hospitals, the authors conclude. Their findings, if replicated at other U.S. hospitals, “should provide reassurance to patients,” they said.

Longer-term COVID-19 lung damage can improve over time

COVID-19 lung damage persists long term but tends to improve, researchers reported on Monday at the European Respiratory Society International Virtual Congress. Researchers studied 86 hospitalized COVID-19 patients, 48% of whom had a smoking history and 21% of whom required intensive care. At 6 weeks after discharge, 47% of patients still reported feeling short of breath. By 12 weeks, that dropped to 39%. CT scans still showed lung damage in 88% of patients at six weeks, dropping to 56% at 12 weeks. “Overall, this study shows that COVID-19 survivors have persisting pulmonary impairment weeks after recovery. Yet, overtime, a moderate improvement is detectable,” lead researcher Dr. Sabina Sahanic, from University Clinic of Internal Medicine in Innsbruck, Austria, said during a press briefing. A related study featured at the meeting stressed the importance of early pulmonary rehabilitation after COVID-19 patients come off a ventilator. This should include balance and walking, muscle strengthening, respiratory exercises and endurance training. “The sooner rehabilitation started and the longer it lasted, the faster and better was the improvement in patients’ walking and breathing capacities and muscle gain,” coauthor Yara Al Chikhanie, from Grenoble Alps University in France, said in a statement.

(Reporting by Nancy Lapid; Editing by Bill Berkrot)

COVID-19 often goes undiagnosed in hospital workers; virus may impair heart functions

By Nancy Lapid

(Reuters) – The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus.

COVID-19 often undiagnosed in front line hospital workers

A high proportion of COVID-19 infections among U.S. healthcare personnel appear to go undetected, according to a report on Monday in the Morbidity and Mortality Weekly Report of the U.S. Centers for Disease Control and Prevention. Between April and June, among more than 3,000 front line workers in 12 states, roughly 1 in 20 had antibody evidence of a previous COVID-19 infection, but 69% of those infections had never been diagnosed. Among those with antibodies to the novel coronavirus, about one-third did not recall having symptoms in the preceding months, nearly half did not suspect that they had been infected, and some two-thirds had never had a positive COVID-19 test. Infections among front line healthcare personnel may be going undetected, the study authors say, because some infections may be only minimally symptomatic or asymptomatic and also because personnel with symptoms may not always have access to testing. COVID-19 antibodies were less common among workers who reported using a face covering for all patient encounters and more common among those who reported a shortage of personal protective equipment. The researchers call for more frequent testing of healthcare personnel and universal use of face coverings in hospitals.

Virus may impair heart’s beating, contracting

Following recent reports that the new coronavirus can invade heart muscle cells comes the discovery that infected cells show impairments in function. In test tube experiments, researchers infected “myocytes,” or heart muscle cells, with the new coronavirus and found that before the infected cells die, they progressively lose their “electrophysiological and contractile properties.” This means they have trouble transmitting the electrical impulses that regulate heartbeats and shortening or lengthening their fibers so the heart can expand and contract to pump blood. In a paper posted online Sunday on bioRxiv ahead of peer review, the researchers note that their test tube experiments likely do not exactly replicate what happens with cells in the body, and more research is needed to confirm their findings. Still, they say, their results suggest that cardiac symptoms in COVID-19 patients are likely a direct effect of the virus and warn that “long-term cardiac complications might be possible … in patients who recover from this illness.”

Eye symptoms common in children with COVID-19

Children with COVID-19 often have non-serious eye symptoms like itching, discharge, or pink eye, a study from China suggests. Among 216 children hospitalized with COVID-19 in Wuhan, the epicenter of the outbreak there, 23% had these kinds of eye issues, doctors found. Eye problems were more common in children with other symptoms such as cough or fever. In all cases, the eye problems were mild and eventually went away either without treatment or with “minimal” eye drops, researchers reported in JAMA Ophthalmology. It is reassuring that most of the children had other symptoms first, said Dr. Douglas Fredrick, chief of pediatric ophthalmology at the Mount Sinai Health system in New York City, who was not involved in the study. If conjunctivitis, or pink eye, were always among the first symptoms, “we’d be more worried that children could spread this by pink eye from one child to another,” he told Reuters. Still, he said, the study doesn’t completely rule out that type of transmission.

Cell phone activity may predict COVID-19 spread

Cell phone use patterns suggest that when people stay home, coronavirus infection rates go down, researchers say. For a study published on Monday in JAMA Internal Medicine, they analyzed publicly available de-identified cell phone activity and location data collected between January and May from 2,740 counties across the United States. After mid-February, when the coronavirus outbreak began, cell phone activity declined significantly in workplaces, stores and restaurants, and mass transit stations and increased in homes – with the greatest initial changes seen in areas with higher rates of COVID-19. Two weeks after cell phone activity shifted away from workplaces and retail locations, the counties with the most pronounced changes had the lowest rates of new COVID-19 cases. “Perhaps reassuringly,” the researchers said, cell phone activity at grocery stores and in areas classified as parks was not strongly associated with rates of growth in COVID-19 cases. They speculate that publicly available cell phone location data might help health offices better predict COVID-19 growth rates and inform decision about where to implement shutdowns and re-openings.

(Reporting by Nancy Lapid and Linda Carroll; Editing by Bill Berkrot)

Scientists see downsides to top COVID-19 vaccines from Russia, China

By Allison Martell and Julie Steenhuysen

TORONTO/CHICAGO (Reuters) – High-profile COVID-19 vaccines developed in Russia and China share a potential shortcoming: They are based on a common cold virus that many people have been exposed to, potentially limiting their effectiveness, some experts say.

CanSino Biologics’ vaccine, approved for military use in China, is a modified form of adenovirus  type 5, or Ad5. The company is in talks to get emergency approval in several countries before completing large-scale trials, the Wall Street Journal reported last week.

A vaccine developed by Moscow’s Gamaleya Institute, approved in Russia earlier this month despite limited testing, is based on Ad5 and a second less common adenovirus.

“The Ad5 concerns me just because a lot of people have immunity,” said Anna Durbin, a vaccine researcher at Johns Hopkins University. “I’m not sure what their strategy is … maybe it won’t have 70% efficacy. It might have 40% efficacy, and that’s better than nothing, until something else comes along.”

Vaccines are seen as essential to ending the pandemic that has claimed over 845,000 lives worldwide. Gamaleya has said its two-virus approach will address Ad5 immunity issues.

Both developers have years of experience and approved Ebola vaccines based on Ad5. Neither CanSino nor Gamaleya responded to requests for comment.

Researchers have experimented with Ad5-based vaccines against a variety of infections for decades, but none are widely used. They employ harmless viruses as “vectors” to ferry genes from the target virus – in this case the novel coronavirus – into human cells, prompting an immune response to fight the actual virus.

But many people already have antibodies against Ad5, which could cause the immune system to attack the vector instead of responding to the coronavirus, making these vaccines less effective.

Several researchers have chosen alternative adenoviruses or delivery mechanisms. Oxford University and AstraZeneca based their COVID-19 vaccine on a chimpanzee adenovirus, avoiding the Ad5 issue. Johnson & Johnson’s candidate uses Ad26, a comparatively rare strain.

Dr. Zhou Xing, from Canada’s McMaster University, worked with CanSino on its first Ad5-based vaccine, for tuberculosis, in 2011. His team is developing an inhaled Ad5 COVID-19 vaccine, theorizing it could circumvent pre-existing immunity issues.

“The Oxford vaccine candidate has quite an advantage” over the injected CanSino vaccine, he said.

Xing also worries that high doses of the Ad5 vector in the CanSino vaccine could induce fever, fueling vaccine skepticism.

“I think they will get good immunity in people that don’t have antibodies to the vaccine, but a lot of people do,” said Dr. Hildegund Ertl, director of the Wistar Institute Vaccine Center in Philadelphia.

In China and the United States, about 40% of people have high levels of antibodies from prior Ad5 exposure. In Africa, it could be as high as 80%, experts said.

HIV RISK

Some scientists also worry an Ad5-based vaccine could increase chances of contracting HIV.

In a 2004 trial of a Merck & Co Ad5-based HIV vaccine, people with pre-existing immunity became more, not less, susceptible to the virus that causes AIDS.

Researchers, including top U.S. infectious diseases expert Dr. Anthony Fauci, in a 2015 paper, said the side effect was likely unique to HIV vaccines. But they cautioned that HIV incidence should be monitored during and after trials of all Ad5-based vaccines in at-risk populations.

“I would be worried about the use of those vaccines in any country or any population that was at risk of HIV, and I put our country as one of them,” said Dr. Larry Corey, co-leader of the U.S. Coronavirus Vaccine Prevention Network, who was a lead researcher on the Merck trial.

Gamaleya’s vaccine will be administered in two doses: The first based on Ad26, similar to J&J’s candidate, and the second on Ad5.

Alexander Gintsburg, Gamaleya’s director, has said the two-vector approach addresses the immunity issue. Ertl said it might work well enough in individuals who have been exposed to one of the two adenoviruses.

Many experts expressed skepticism about the Russian vaccine after the government declared its intention to give it to high-risk groups in October without data from large pivotal trials.

“Demonstrating safety and efficacy of a vaccine is very important,” said Dr. Dan Barouch, a Harvard vaccine researcher who helped design J&J’s COVID-19 vaccine. Often, he noted, large-scale trials “do not give the result that is expected or required.”

(Additional reporting by Christine Soares in New York, Kate Kelland in London, Polina Ivanova in Moscow and Roxanne Liu in Beijing; Editing by Caroline Humer and Bill Berkrot)

What you need to know about the coronavirus right now

(Reuters) – Here’s what you need to know about the coronavirus right now:

Global records

India reported 78,512 new novel coronavirus infections on Monday, slightly fewer than its record set the previous day when it posted the biggest, single-day tally of infections of any country in the pandemic. On Sunday, India’s total of 78,761 new cases exceeded the previous record of 77,299 in the United States on July 16, a Reuters tally of official data showed.

Despite the surging case numbers, Prime Minister Narendra Modi has been pushing for a return to normalcy to lessen the economic pain of the pandemic, having earlier imposed strict lockdowns of the country’s 1.3 billion people.

U.S. cases of the novel coronavirus surpassed 6 million on Sunday as many states in the Midwest reported increasing infections, according to a Reuters tally. While the United States has the most recorded infections in the world, it ranks tenth based on cases per capita.

More than eight months into the pandemic, the United States continues to struggle with testing. The number of people tested has fallen in recent weeks. Public health officials believe the United States needs to test more frequently to find asymptomatic coronavirus carriers to slow the spread of the COVID-19 disease.

Mutation found in Indonesia

A more infectious mutation of the new coronavirus has been found in Indonesia, the Jakarta-based Eijkman Institute for Molecular Biology said on Sunday, as the Southeast Asian country’s caseload surges.

The “infectious but milder” D614G mutation of the virus has been found in genome sequencing data from samples collected by the institute, deputy director Herawati Sudoyo told Reuters, adding that more study is required to determine whether that was behind the recent rise in cases.

The strain, which the World Health Organization said was identified in February and has been circulating in Europe and the Americas, has also been found in neighboring Singapore and Malaysia.

Vaccine approval and use underway in China

Sinovac Biotech Ltd’s coronavirus vaccine candidate CoronaVac was approved for emergency use as part of a program in China to vaccinate high-risk groups such as medical staff, a person familiar with the matter said.

China National Biotec Group (CNBG), a unit of state-owned pharmaceutical giant China National Pharmaceutical Group (Sinopharm), also said it had obtained emergency use approval for a coronavirus vaccine candidate in social media platform WeChat last Sunday. CNBG, which has two vaccine candidates in phase 3 clinical trials, did not say which of its vaccines had been cleared for emergency use.

China has been giving experimental coronavirus vaccines to high-risk groups since July, though officially it has given little details on which vaccine candidates have been given to high-risk people under the emergency use program and how many people have been vaccinated.

Lighter traffic in Seoul; masks on in Auckland

Private tuition centers shut for the first time and traffic was lighter in South Korea’s capital on Monday, the first working day of tighter social-distancing rules designed to halt a second wave of coronavirus outbreaks.

The decision came after earlier restrictions on movement failed to prevent a second wave of coronavirus infections from erupting at churches, offices, nursing homes and medical facilities.

Meanwhile in Auckland, schools and businesses reopened on Monday after the lifting of a lockdown in New Zealand’s largest city to contain the resurgence of the coronavirus, but face masks were made mandatory on public transport across the country. Prime Minister Jacinda Ardern said she was confident the new measure would be taken up across New Zealand, adding that “a bit of smiling with the eyes behind the mask” and kindness to Aucklanders in particular, would help get the country through the latest outbreak.

(Compiled by Karishma Singh; Editing by Jacqueline Wong)

Trump to resume coronavirus briefings after hiatus

By Steve Holland

WASHINGTON (Reuters) – U.S. President Donald Trump, under fire over his administration’s response to the surging coronavirus, said on Monday he will resume holding news briefings on the pandemic after a lengthy hiatus.

He told reporters in the Oval Office the resumption was prompted by a “big flareup in Florida, Texas, a couple of other places.” The virus has killed 140,000 Americans and infected some 3.7 million, both figures leading the world.

White House debate has centered on whether Trump should risk doing daily briefings after he was mocked for musing that people might inject household disinfectants as a way to protect themselves from contracting the virus.

The briefings ended in early May after the new White House of chief staff, Mark Meadows, sought a new focus for the president’s messaging on the subject.

Trump said he expected the first new briefing would take place about 5 p.m. EDT (2100 GMT) on Tuesday.

“We’re going to give you a lot of briefings over the next week and the next few weeks,” he said.

He said he would bring in the heads of some companies involved in the search for vaccines and other treatments for the virus, such as Johnson & Johnson.

(Reporting by Steve Holland; Editing by Howard Goller)

How a vaccine made of mosquito spit could help stop the next epidemic

By Clare Baldwin

(Reuters) – Five years ago, in an office complex with a giant sculpture of a mosquito just northwest of Phnom Penh, Jessica Manning struck on a novel idea. Rather than spend more years in what felt like a futile search for a malaria vaccine, she would take on all mosquito-borne pathogens at once.

Her idea revolved around mosquito spit.

A lab technician Nhek Sreynik works with mosquitoes, at a lab in Kompong Speu Province, in Cambodia, June 11, 2020. REUTERS/Chantha Lach

Building on the work of colleagues and other scientists, Manning, a clinical researcher for the U.S. National Institute of Allergy and Infectious Diseases, believed she could use pieces of mosquito saliva protein to build a universal vaccine.

The vaccine, if it pans out, would protect against all of the pathogens the insects inject into humans – malaria, dengue, chikungunya, Zika, yellow fever, West Nile, Mayaro viruses and anything else that may emerge.

“We need more innovative tools,” said Manning. A vaccine like this would be “the Holy Grail.”

On Thursday, The Lancet published the initial results of this work with her colleagues: the first-ever clinical trial of a mosquito spit vaccine in humans.

The trial showed that an Anopheles mosquito-based vaccine was safe and that it triggered antibody and cellular responses.

Michael McCracken, a researcher not involved in the study, called the initial results “foundational.”

“This is big, important work,” said McCracken, who studies immune responses to mosquito-borne viruses at the Walter Reed Army Institute of Research in Maryland. “Mosquitoes are arguably the deadliest animal on Earth.”

A boy sits in the pediatrics ward at Kampong Speu District Referral Hospital, at the beginning of a dengue, also called ‘breakbone fever’, epidemic in Krong Chbar Mon, Cambodia April 2019. Jessica Manning/Handout

Malaria alone kills more than 400,000 people each year, according to the World Health Organization. Those deaths occur mostly in poor countries that do not receive as much vaccine research and funding. Because of global warming, however, those mosquitoes that thrive in the tropics are moving into more countries each year.

The global disruption of the COVID-19 pandemic has brought a sharp focus to infectious diseases and vaccine research. One of the key areas of concern are pathogens transmitted by mosquitoes.

The novel coronavirus, believed to have originated in bats, has so far infected more than 7.4 million people and killed nearly 420,000 worldwide. The Asian Development Bank estimates the pandemic could cost the global economy as much as $8.8 trillion.

TARGETING THE CARRIER

Manning’s research is specific to mosquitoes but is an example of how scientists are broadening their thinking about how to tackle infectious diseases, and the new types of tools they are developing.

What Manning is looking for is called a vector-based vaccine. A vector is the living organism – like a mosquito – that transmits a pathogen such as malaria – between humans, or from animals to humans.

All existing vaccines for humans target a pathogen. Manning’s goes after the vector.

The idea is to train the body’s immune system to recognize the saliva proteins and mount a response that would weaken or prevent an infection.

Scientists have known for decades that mosquito spit helps establish mosquito-borne infections and enhance their severity. Just recently, scientists have begun to exploit this.

A study of macaque monkeys published in 2015 showed vaccination with sand fly saliva reduced leishmaniasis lesion size and parasite load. A study of mice published in 2018 showed immunization with Anopheles mosquito spit protected against malaria. Another mouse study published last year showed immunization with Aedes mosquito saliva improved survival against the Zika virus.

The study published in The Lancet was conducted in 2017.

The Phase I trial conducted at the National Institutes of Health Clinical Center in Bethesda, Maryland, tested for safety and side effects in 49 healthy volunteers.

Participants were randomly assigned to receive one of two versions of the vaccine or a placebo. After a few weeks, hungry mosquitoes were placed on the arms of study participants. The study measured immune response to the mosquito spit proteins but did not involve pathogens.

More trials are needed to determine the effect the mosquito spit vaccine would have against actual pathogens.

No systemic safety concerns were identified. One participant developed an 8-centimeter (3.15 inches) reddened area around the injection site and was treated with steroids and antihistamines.

“I’m not as worried about redness as I would be about something more systemic like fever, headache, muscle aches, nausea or vomiting,” said Stephen Thomas, an infectious disease expert at SUNY Upstate Medical University who was not involved with the study.

Thomas has previously worked on dengue vaccine programs for the U.S. Department of Defense and helped manage its response to Ebola and the Zika virus.

Another scientist at the University of Maryland is running a follow-up trial with more mosquito spit proteins and a different vaccine formulation.

Meanwhile, Manning has returned to Cambodia and is running a field study to identify vaccine-candidate spit proteins in Aedes mosquitoes. She also has a separate project sequencing the genomes of all pathogens found in Aedes and Culex mosquitoes, some of which can infect humans.

One worrying discovery so far? “They carry a ton of different viruses that we are only just discovering.”

(Reporting by Clare Baldwin; Editing by Elyse Tanouye and Bill Berkrot)

Fears of coronavirus second wave prompt flu push at U.S. pharmacies, drugmakers

By Caroline Humer and Julie Steenhuysen

NEW YORK (Reuters) – U.S. pharmacy chains are preparing a big push for flu vaccinations when the season kicks off in October, hoping to curb tens of thousands of serious cases that could coincide with a second wave of coronavirus infections.

CVS Health Corp, one of the largest U.S. pharmacies, said it is working to ensure it has vaccine doses available for an anticipated surge in customers seeking shots to protect against seasonal influenza.

Rival chain Rite Aid Corp has ordered 40 percent more vaccine doses to meet the expected demand. Walmart Inc and Walgreens Boots Alliance said they also are expecting more Americans to seek these shots.

Drugmakers are ramping up to meet the demand. Australian vaccine maker CSL Ltd’s Seqirus said demand from customers has increased by 10 percent. British-based GlaxoSmithKline said it is ready to increase manufacturing as needed.

A Reuters/Ipsos poll of 4,428 adults conducted May 13-19 found that about 60 percent of U.S. adults plan to get the flu vaccine in the fall. Typically fewer than half of Americans get vaccinated. The U.S. Centers for Disease Control and Prevention (CDC) recommends the vaccine for everyone over age 6 months.

Getting a flu shot does not protect against COVID-19, the respiratory disease caused by the novel coronavirus for which there are no approved vaccines. Public health officials have said vaccination against the flu will be critical to help prevent hospitals from becoming overwhelmed with flu and COVID-19 patients.

“We’re in for a double-barreled assault this fall and winter with flu and COVID. Flu is the one you can do something about,“ Vanderbilt University Medical Center infectious disease expert Dr. William Schaffner said.

Drugmakers last year produced nearly 170 million doses of influenza vaccine, according to the CDC. There were up to 740,000 hospitalizations and 62,000 deaths in the 2019-2020 flu season that ended last month, the CDC said.

While health insurance typically covers the flu shot at a doctor’s office and other groups offer free flu vaccine clinics, the adult vaccine retails for about $40, putting the U.S. market at up to $6.8 billion. The CDC secures some doses at a discount price in its child vaccination program.

Global revenue for influenza vaccines is about $5 billion, according to Wall Street firm Bernstein, and in the United States each additional 1 percentage point of Americans getting the vaccine is worth $75 million in revenues to drugmakers.

HEAVIER TOLL

CDC Director Robert Redfield has said that flu and COVID-19 combined could exact a heavier toll on Americans than the initial coronavirus outbreak that began this winter.

Some experts said creative ways must be developed to ensure that people are vaccinated against flu because patients may be less likely to see their doctors in person out of fear of getting infected with the coronavirus in medical offices.

Pharmacies, public health clinics and other flu shot providers may need to develop drive-up clinics – popular with COVID-19 diagnostic tests – for flu vaccines, said Dr. Nancy Messonnier, director of the CDC’s National Center for Immunization and Respiratory Disease.

“My goal is that every single vaccine dose that gets made gets into somebody’s arm to protect them. I don’t want any vaccines left on the shelves or in doctors’ offices,” Messonnier said in an interview.

One reason for reluctance among Americans to get the flu shot is that it does not always prevent disease, in part because the flu strains selected as targets of the vaccine months ahead of time are not always a perfect match for the dominant flu strains that actually circulate in any given season. But the shots reliably reduce hospitalizations every year, according to experts.

“Even if it protects 35 to 40 percent of the population, it’s a lot better than zero,” University of Minnesota influenza expert Dr. Michael Osterholm said.

In a survey commissioned by CVS Health between January and May, consumers who said they will definitely or are likely to get a flu shot rose from 34 percent to 65 percent. They also said they would increasingly go to pharmacies and less often to a doctor’s office or healthcare centers.

Rite Aid Chief Pharmacy Officer Jocelyn Konrad said the pharmacy chain, which provided about 2.6 million flu shots last year, upped its order by 40 percent this year.

Rite Aid said social distancing policies may cut into workplace flu clinics but that it may offer voucher programs to employers and is considering setting up drive-through clinics. In Australia, where the winter flu season is underway, such sites are already in use.

Some U.S. doctors are also considering clinics in parks and community centers and even home visits for vulnerable patients, said David Ross, vice president of commercial operations for North America at Seqirus.

“As we look at immunization this coming fall, it will play an enormous role in this battle against COVID-19,” Ross said.

(Reporting by Caroline Humer in New York and Julie Steenhuysen in Chicago; Additional reporting by Grant Smith in New York; Editing by Michele Gershberg and Will Dunham)

Monkeys infected with COVID-19 develop immunity in studies, a positive sign for vaccines

By Julie Steenhuysen

CHICAGO (Reuters) – Two studies in monkeys published on Wednesday offer some of the first scientific evidence that surviving COVID-19 may result in immunity from reinfection, a positive sign that vaccines under development may succeed, U.S. researchers said on Wednesday.

Although scientists have assumed that antibodies produced in response to the new coronavirus virus are protective, there has been scant scientifically rigorous evidence to back that up.

In one of the new studies, researchers infected nine monkeys with COVID-19, the illness caused by the novel coronavirus. After they recovered, the team exposed them to the virus again and the animals did not get sick.

The findings suggest that they “do develop natural immunity that protects against re-exposure,” said Dr. Dan Barouch, a researcher at the Center for Virology and Vaccine Research at Harvard’s Beth Israel Deaconness Medical Center in Boston, whose studies were published in the journal Science.

“It’s very good news,” Barouch said.

Several research teams have released papers – many of them not reviewed by other scientists – suggesting that a vaccine against the virus would be effective in animals.

In the second study, Barouch and colleagues tested 25 monkeys with six prototype vaccines to see if antibodies produced in response were protective.

They then exposed these monkeys and 10 control animals to SARS-CoV-2, the official name of the novel coronavirus.

All of the control animals showed high degrees of virus in their noses and lungs, but in the vaccinated animals, “we saw a substantial degree of protection,” Barouch said. Eight of the vaccinated animals were completely protected.

These studies, which have been peer reviewed, do not prove that humans develop immunity or how long it might last, but they are reassuring.

“These data will be seen as a welcome scientific advance,” Barouch said.

(Reporting by Julie Steenhuysen; Editing by Bill Berkrot)

T cells play a role in fighting coronavirus; COVID-19 affects children differently

By Nancy Lapid

NEW YORK (Reuters) – The following is a brief roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus.

Immune system’s T cells play a role in attacking the coronavirus

While the immune system’s B cells make antibodies that block the novel coronavirus, its T cells provide another line of attack, according to new research. Researchers found that T cells from recovered patients can target the virus. That is promising news for vaccine developers because it is “consistent with normal, good, antiviral immunity,” Shane Crotty, from the Center for Infectious Disease and Vaccine Research at the La Jolla Institute for Immunology in California, told Reuters. “The types of immune responses targeted by many candidate vaccines are now shown to be the types of immune responses seen in COVID-19 cases that successfully recovered from the disease.” Furthermore, some people who never had COVID-19 nonetheless had T cells that could attack the virus, Crotty’s team reported on Thursday in the journal Cell. This suggests that past exposure to other coronaviruses (such as those that cause the common cold) had somehow primed their T cells to recognize and attack this new coronavirus. That might influence their susceptibility to COVID-19 disease, he said, either preventing them from getting infected or from developing severe disease.

Coronavirus affects adults and children differently

Children appear to have much lower rates of infection with the new coronavirus than adults, but most reports on COVID-19 in youngsters have focused only on small groups. A team of Chinese researchers has analyzed data from 24 earlier studies involving a total of nearly 2,600 children with COVID-19, enabling them to shed light on ways in which the virus acts differently in pediatric patients. They reported on Sunday in the Journal of Medical Virology that the most common laboratory test abnormality observed in adults was a low level of immune cells called lymphocytes (B cells and T cells). This condition, known as lymphopenia, developed in up to 80% of adults but in less than 10% of children. On the other hand, children – particularly infants – were more likely to have elevated levels of cardiac enzymes that indicate heart injury. They also found additional differences. The rates of severe illness and critical illness in adults were 14% and 5%, respectively (according to earlier reports). That compared with 4.4% and 0.9% in children. Fever occurred in up to 99% of adults but in 43% of children; cough in up to 82% of adults but 43% of children. Shortness of breath and acute respiratory distress syndrome (ARDS) were rare in children, but digestive tract symptoms like diarrhea were more common in kids than in grownups.

Coronavirus can infect patients taking hydroxychloroquine

Taking hydroxychloroquine for other medical conditions might not protect against the new coronavirus, French doctors say. The drug had nearly become a standard of care for patients with COVID-19 in many hospitals, even though randomized trials have not yet confirmed its value. But people around the world use decades-old hydroxychloroquine to treat malaria as well as inflammatory conditions like lupus and rheumatoid arthritis, and researchers are seeing occasional cases of coronavirus infection in these patients despite long-term use of the drug. A report on Sunday in the Journal of Antimicrobial Chemotherapy describes two such patients, one with rheumatoid arthritis and the other with a condition called mixed connectivitis. The authors say they also know of at least three other patients in Italy who became sick with COVID-19 despite taking hydroxychloroquine for chronic arthritis. “Patients actually taking long-term hydroxychloroquine are potentially immunosuppressed patients since they are living with chronic inflammatory diseases and thus do not represent the general population exposed to COVID-19,” the French doctors acknowledge. “However, these observational data are not in favor of a universal protective effect of hydroxychloroquine.”

New barcoding technique can help process 100,000 screening tests per day

A big challenge in preventing the spread of the new coronavirus is to identify and quarantine infected people who do not have symptoms. Laboratory workers can test blood samples from thousands of patients per day, still not enough to efficiently screen heavily populated areas. Now researchers at the OSU James Comprehensive Cancer Center in Columbus, Ohio say they have a way to screen over 100,000 samples per day. Their system, dubbed REMBRANDT, makes copies of the virus and introduces two barcodes that simplify patient identification. Barcoding of samples for screening is not new, but the OSU method takes a unique biochemical approach, aiming for a single barcoding and virus-copying step. “Barcodes on products in the supermarket and molecular barcodes for REMBRANDT work the same way,” investigator Richard Fishel told Reuters. “In this case, each patient has a unique combination of letters that allows for their simplified identification. With ten Next Generation sequencing machines, REMBRANDT can test every Ohio resident for COVID-19 infection every 10 days – an important step in contact tracing and reducing the spread of infection.” His team’s report, published on Sunday on the preprint server bioRxiv, has not yet been peer reviewed. “Our next step,” Fishel said, “will be to collaborate with hospitals and public health departments to clinically validate REMBRANDT and make it available to a wider audience.”

(Reporting by Nancy Lapid; Editing by Bill Berkrot)