‘Great day for humanity’: Pfizer says COVID-19 vaccine over 90% effective

By Michael Erman and Julie Steenhuysen

(Reuters) – Pfizer Inc’s experimental COVID-19 vaccine is more than 90% effective based on initial trial results, the drugmaker said on Monday, a major victory in the war against a virus that has killed over a million people and battered the world’s economy.

Experts welcomed the first successful interim data from a large-scale clinical test as a watershed moment that showed vaccines could help halt the pandemic, although mass roll-outs, which needs regulatory approval, will not happen this year.

Pfizer and German partner BioNTech SE said they had found no serious safety concerns yet and expected to seek U.S. authorization this month for emergency use of the vaccine, raising the chance of a regulatory decision as soon as December.

If granted, the companies estimate they can roll out up to 50 million doses this year, enough to protect 25 million people, and then produce up to 1.3 billion doses in 2021.

“Today is a great day for science and humanity,” said Pfizer Chief Executive Albert Bourla.

“We are reaching this critical milestone in our vaccine development program at a time when the world needs it most with infection rates setting new records, hospitals nearing over-capacity and economies struggling to reopen,” he said.

Experts said they still wanted to see the full trial data, which have yet to be peer-reviewed or published in a medical journal, but the preliminary results looked encouraging.

“This news made me smile from ear to ear. It is a relief to see such positive results on this vaccine and bodes well for COVID-19 vaccines in general,” said Peter Horby, professor of emerging infectious diseases at the University of Oxford.

There are still many questions, such as how effective the vaccine is by ethnicity or age, and how long it will provide immunity, with the “new normal” of social distancing and face covering set to remain for the foreseeable future.

Pfizer expects to seek U.S. emergency use authorization for people aged 16 to 85. To do so, it will need two months of safety data from about half the study’s 44,000 participants, which is expected in the third week of November.

U.S. Health and Human Services Secretary Alex Azar said it would take several weeks for U.S. regulators to receive and process data on the vaccine before the government could potentially approve it.

MARKETS SURGE

The prospect of a vaccine electrified world markets with the S&P 500 and Dow hitting record highs as shares of banks, oil companies and travel companies soared. Shares in companies that have thrived during lockdowns, such as conferencing platform Zoom Video and online retailers, tumbled.

Pfizer shares jumped more than 11% to their highest since July last year, while BioNTech’s stock hit a record high.

Shares of other vaccine developers in the final stage of testing also rose with Johnson & Johnson up 4% and Moderna Inc, whose vaccine uses a similar technology as the Pfizer shot, up 8%. Britain’s AstraZeneca, however, fell 2%. Moderna is expected to report results from its large-scale trial later this month.

“The efficacy data are really impressive. This is better than most of us anticipated,” said William Schaffner, infectious diseases expert at Vanderbilt University School of Medicine in Nashville, Tennessee. “The study isn’t completed yet, but nonetheless the data look very solid.”

U.S. President Donald Trump welcomed the test results, and the market boost: “STOCK MARKET UP BIG, VACCINE COMING SOON. REPORT 90% EFFECTIVE. SUCH GREAT NEWS!” he tweeted.

President-elect Joe Biden said the news was excellent but did not change the fact that face masks, social distancing and other health measures would be needed well into next year.

The World Health Organization said the results were very positive, but warned there was a funding gap of $4.5 billion that could slow access to tests, medicines and vaccines in low- and middle-income countries.

‘NEAR ECSTATIC’

“I’m near ecstatic,” Bill Gruber, one of Pfizer’s top vaccine scientists, said in an interview. “This is a great day for public health and for the potential to get us all out of the circumstances we’re now in.”

Between 55% and 65% of the population will need to be vaccinated to break the dynamic of the spread of COVID-19, said Germany’s health minister Jens Spahn, adding that he did not expect a shot to be available before the first quarter of 2021.

The European Union said on Monday it would soon sign a contract for up to 300 million doses of the Pfizer and BioNTech COVID-19 vaccine.

The companies have a $1.95 billion contract with the U.S. government to deliver 100 million vaccine doses beginning this year. They did not receive research funding from the Trump administration’s Operation Warp Speed vaccine program.

The drugmakers have also reached supply agreements with the United Kingdom, Canada and Japan.

Pfizer said the interim analysis, conducted after 94 participants in the trial developed COVID-19, examined how many had received the vaccine versus a placebo.

Pfizer did not break down how many of those who fell ill received the vaccine. Still, over 90% effectiveness implies that no more than 8 of the 94 had been given the vaccine, which was administered in two shots about three weeks apart.

The efficacy rate, which could drop once full results are available, is well above the 50% effectiveness required by the U.S. Food and Drug Administration for a coronavirus vaccine.

Shortly after Pfizer’s announcement, Russia said its Sputnik V vaccine was also more than 90% effective, based on data collated from inoculations of the public. Its preliminary Phase III trial data is due to be published this month.

MORE DATA NEEDED

To confirm the efficacy rate, Pfizer said it would continue its trial until there were 164 COVID-19 cases among volunteers. Bourla told CNBC on Monday that based on rising infection rates, the trial could be completed before the end of November.

Pfizer said its data would be peer reviewed once it has results from the entire trial.

“These are interesting first signals, but again they are only communicated in press releases,” said Marylyn Addo, head of tropical medicine at the University Medical Center Hamburg-Eppendorf in Germany.

Dozens of drugmakers and research groups around the globe have been racing to develop vaccines against COVID-19, which on Sunday exceeded 50 million cases since the new coronavirus first emerged late last year in China.

The Pfizer and BioNTech vaccine uses messenger RNA (mRNA) technology, which relies on synthetic genes that can be generated and manufactured in weeks, and produced at scale more rapidly than conventional vaccines. The technology is designed to trigger an immune response without using pathogens, such as actual virus particles.

The Trump administration has said it will have enough vaccine doses for all of the 330 million U.S. residents who want it by the middle of 2021.

(Reporting by Michael Erman and Julie Steenhuysen; Additional reporting by Michele Gershberg in New York, Ludwig Burger and Patricia Weiss in Frankfurt and Kate Kelland in London; Editing by Bill Berkrot, Caroline Humer, Edwina Gibbs and David Clarke)

Second UK lockdown? PM says second wave inevitable, new restrictions possible

By Guy Faulconbridge, Kate Holton and Andy Bruce

LONDON (Reuters) – British Prime Minister Boris Johnson said he did not want another national lockdown but that new restrictions may be needed because the country was facing an “inevitable” second wave of COVID-19.

Ministers were on Friday reported to be considering a second national lockdown, after new COVID-19 cases almost doubled to 6,000 per day, hospital admissions rose and infection rates soared across parts of northern England and London.

That rise in cases was part of a second wave that was now unstoppable, the prime minister said.

“We are now seeing a second wave coming in…It is absolutely, I’m afraid, inevitable, that we will see it in this country,” Johnson told UK media.

Asked about whether the whole of the country should brace for a new lockdown, rather than just local restrictions, he said: “I don’t want to get into a second national lockdown at all.”

But he did not rule out further national restrictions being brought in.

“When you look at what is happening, you’ve got to wonder whether we need to go further than the rule of six that we brought in on Monday,” he said, referring to the ban on gatherings of more than six people.

The United Kingdom has reported the fifth largest number of deaths from COVID-19 in the world, after the United States, Brazil, India and Mexico, according to data collected by Johns Hopkins University of Medicine.

The UK’s official number of new positive cases shot up by nearly a thousand on Friday to 4,322, the highest since May 8, after a separate ONS model pointed to about 6,000 new cases a day in England in the week to Sept. 10.

That was up from modelling of 3,200 cases per day in the previous week, with the North West and London seen as hotspots.

Health Minister Matt Hancock called a second national lockdown a last resort earlier on Friday and when he was asked about it said: “I can’t give you that answer now.”

SPREADING WIDELY ACROSS ALL AGES

The UK said its reproduction “R” number of infections has risen to a range of 1.1-1.4 from last week’s 1.0-1.2.

“We’re seeing clear signs this virus is now spreading widely across all age groups and I am particularly worried by the increase in rates of admission to hospital and intensive care among older people,” said Yvonne Doyle, Medical Director at Public Health England.

“This could be a warning of far worse things to come.”

Britain imposed new COVID regulations on the North West, Midlands and West Yorkshire from Tuesday. More than 10 million people in the United Kingdom are already in local lockdown, and restrictions for millions more could be on the way.

London Mayor Sadiq Khan said later on Friday that it was “increasingly likely” that additional measures would soon be required in Britain’s biggest city. He said he had seen evidence about the spread of the virus in London which was “extremely” concerning.

COVID-19 cases started to rise again in Britain in September, with between 3,000 and 4,000 positive tests recorded daily in the last week. This is still some way behind France, which is seeing more than 10,000 new cases a day.

“COVID-19 infection rates have increased in most regions, particularly the North West and London,” the ONS said.

The ONS said there had been clear evidence of an increase in the number of people testing positive aged 2 to 11 years, 17 to 24 years and 25 to 34 years.

Johnson was criticized by opposition politicians for his initial response to the outbreak and the government has struggled to ensure sufficient testing in recent weeks.

Asked by LBC radio why the testing system was such a “shambles”, Hancock said Dido Harding, who is in charge of the system, had done an “an extraordinary job.”

(Reporting by Guy Faulconbridge, Kate Holton and Sarah Young; Editing by Raissa Kasolowsky, Mike Collett-White, Philippa Fletcher, William Maclean)

Exclusive: Hong Kong activists discuss ‘parliament-in-exile’ after China crackdown

By Natalie Thomas and Guy Faulconbridge

LONDON (Reuters) – Hong Kong pro-democracy activists are discussing a plan to create an unofficial parliament-in-exile to keep the flame of democracy alive and send a message to China that freedom cannot be crushed, campaigner Simon Cheng told Reuters.

Hong Kong, a former British colony that returned to Chinese rule in 1997, was convulsed by months of often violent pro-democracy, anti-China protests last year against Chinese interference in its promised freedoms, the biggest political crisis for Beijing since the Tiananmen Square protests of 1989.

Hong Kong police fired water cannon and tear gas and arrested more than 300 people on Wednesday as protesters took to the streets again in defiance of new, sweeping security legislation introduced by China to snuff out dissent.

The law pushes China’s freest city and one of the world’s most glittering financial hubs on to a more authoritarian path. China, which denies interfering in Hong Kong, has warned foreign powers not to meddle in its affairs.

Cheng, a Hong Kong citizen, worked for the British consulate in the territory for almost two years until he fled after he said he was beaten and tortured by China’s secret police. Cheng, who has since been granted asylum by Britain, describes himself as pro-democracy campaigner.

“A shadow parliament can send a very clear signal to Beijing and the Hong Kong authorities that democracy need not be at the mercy of Beijing,” he told Reuters in London. “We want to set up non-official civic groups that surely reflect the views of the Hong Kong people.”

He said that while the idea was still at an early stage, such a parliament-in-exile would support the people of Hong Kong and the pro-democracy movement there. He declined to say where the parliament might sit.

“We are developing an alternative way to fight for democracy,” Cheng said. “We need to be clever to deal with the expanding totalitarianism: they are showing more powerful muscle to suppress so we need to be more subtle and agile.”

He said more and more people were “losing hope that it is effective to go out on to the streets or run for election” to Hong Kong’s Legislative Council, or mini-parliament.

“We should stand with the Hong Kong people and support those staying in Hong Kong,” he said.

‘VERY GOOD SIGNAL’

Asked about HSBC’s support for the sweeping national security law, Cheng said the British government should speak to senior British capitalists to make them understand the importance of democracy.

After Prime Minister Boris Johnson offered millions of Hong Kong residents the path to British citizenship following China’s imposition of the law, hundreds of thousands of people would come to the United Kingdom, Cheng said.

“The UK has given a very good signal,” Cheng said. “At least hundreds of thousands of people will come.”

Almost 3 million Hong Kong residents are eligible for the so called British National (Overseas) passport. There were 349,881 holders of the passports as of February, Britain said.

“One day we will be back in Hong Kong,” Cheng said.

Hong Kong returned to China 23 years ago with the guarantee of freedoms not enjoyed on the mainland, including its independent legal system and rights to gather and protest, under a “one country, two systems” formula.

Huge protests calling for democracy, especially on the anniversaries of the June 4, 1989, Tiananmen crackdown, were common and brought major streets to a standstill for 79 days in the Umbrella movement of 2014.

The national security law punishes crimes of secession, subversion, terrorism and collusion with foreign forces with up to life in prison, will see mainland security agencies in Hong Kong for the first time and allows extradition to the mainland for trial.

(Reporting by Natalie Thomas, editing by Guy Faulconbridge and Stephen Addison)

UK says some children have died from syndrome linked to COVID-19

By Guy Faulconbridge and Kate Holton

LONDON (Reuters) – Some children in the United Kingdom with no underlying health conditions have died from a rare inflammatory syndrome which researchers believe to be linked to COVID-19, Health Secretary Matt Hancock said on Tuesday.

Italian and British medical experts are investigating a possible link between the coronavirus pandemic and clusters of severe inflammatory disease among infants who are arriving in hospital with high fevers and swollen arteries.

Doctors in northern Italy, one of the world’s hardest-hit areas during the pandemic, have reported extraordinarily large numbers of children under age 9 with severe cases of what appears to be Kawasaki disease, more common in parts of Asia.

“There are some children who have died who didn’t have underlying health conditions,” Hancock told LBC Radio.

“It’s a new disease that we think may be caused by coronavirus and the COVID-19 virus, we’re not 100% sure because some of the people who got it hadn’t tested positive, so we’re doing a lot of research now but it is something that we’re worried about.”

Children were until now thought to be much less susceptible than their parents or grandparents to the most deadly complications wrought by the novel coronavirus, though the mysterious inflammatory disease noticed in Britain, Spain and Italy may demand a reassessment.

“It is rare, although it is very significant for those children who do get it, the number of cases is small,” Hancock, one of the ministers leading Britain’s COVID-19 response, said.

He did not give an exact figure for the number of deaths.

Kawasaki disease, whose cause is unknown, is associated with fever, skin rashes, swelling of glands, and in severe cases, inflammation of arteries of the heart.

Britain’s National Health Service says the syndrome only affects about eight in every 100,000 children every year, with most aged under 5.

There is some evidence that individuals can inherit a predisposition to the disease, but the pattern is not clear.

Children either testing positive for COVID-19 or for its antibodies have presented gastrointestinal symptoms such as abdominal pain, vomiting and diarrhea in the last two weeks, the Spanish Pediatric Association said on Monday.

Though the children were otherwise in good health, their condition could evolve within hours into shock, featuring tachycardia and hypotension even without fever.

Most cases were detected in school-age or teenage minors, and sometimes overlapped with Kawasaki disease or toxic shock syndrome (TSS).

Parents should be vigilant, junior British interior minister Victoria Atkins said.

“It demonstrates just how fast moving this virus is and how unprecedented it is in its effect,” Atkins told Sky News.

Professor Anne Marie Rafferty, the president of the Royal College of Nursing, said she had heard reports about the similarity between cases in infants and Kawasaki syndrome.

“Actually there’s far too little known about it and the numbers actually at the moment are really too small,” told Sky News. “But it is an alert, and it’s something that’s actually being explored and examined by a number of different researchers.”

(Reporting by Guy Faulconbridge and Kate Holton in London and Clara-Læïla Laudette in Madrid; editing by Michael Holden and Angus MacSwan)

UK coronavirus deaths rise by 27% to 1,789

UK coronavirus deaths rise by 27% to 1,789
LONDON (Reuters) – The number of deaths from coronavirus in the United Kingdom rose by 27% in the space of a day to 1,789 as of Monday at 1600 GMT, the government said.

The number of confirmed cases rose by 14% to 25,150 as of Tuesday at 0800 GMT, the Department for Health and Social Care said.

(Reporting by Andy Bruce; editing by Stephen Addison)

UK coronavirus death toll rises to 1,408

LONDON (Reuters) – The number of people who have died after testing positive for coronavirus in the United Kingdom rose to 1,408, according to figures released on Monday, an increase of 180, a smaller rise than the previous set of numbers.

The figures are accurate up to 17:00 local time on March 29.

The previous increase saw the death toll rise by 209.

There are a total of 22,141 positive cases as of 0900 local time on March 30, the health ministry said.

(Reporting by Costas Pitas and Paul Sandle; editing by Stephen Addison)

UK to pass law to stop early release of terrorists by February 27: government source

LONDON (Reuters) – Britain plans to pass emergency legislation by Feb. 27 to prevent convicted terrorists automatically being released from prison half-way through their sentence, a government source said on Wednesday.

Justice minister Robert Buckland announced plans for the law earlier this week after an Islamist attacker stabbed two people in London on Sunday. Sudesh Amman had been released from prison half-way through his term on Jan. 23, despite still being considered a risk by authorities.

He was shot dead by police officers who had placed him under covert surveillance.

The new emergency law will be introduced to parliament on Tuesday next week.

“If the legislation is passed by Feb. 27 we can prevent the automatic release of any further terrorist suspects who might pose a threat to the public,” the source said.

“This is emergency legislation which we believe is vital for protecting the public … We cannot continue to be in a position where the state has no power to block the release of terrorists who continue to pose a threat.”

Neil Basu, the country’s top counter-terrorism police officer, welcomed the move to keep the most dangerous offenders locked up for longer but said it was only part of the solution. More had to be done to prevent people becoming radicalized in the first place, he said.

“With 3000 or so subjects of interest currently on our radar and many convicted terrorists soon due to be released from prison, we simply cannot watch all of them, all the time.”

“Early intervention … is absolutely key. We need families, friends, colleagues and local communities to recognize that early intervention is not ruining someone’s life but saving it, and potentially that of others, too,” he said in a statement.

The government has said the legislation will apply to those already in prison, prompting predictions from some opponents that it could be challenged in the courts for breaching human rights law.

“What we are proposing in this emergency legislation is not to retrospectively alter offenders’ sentences as they were imposed by the court,” the government source said.

“This is in relation to release arrangements which are part of the administration of a sentence and it would be our position that you can change those without being considered to breach an offender’s human rights.”

London police chief Cressida Dick said if there were to be changes to sentencing, when offenders were released they needed to be freed on “strong license conditions”.

Islamic State has claimed responsibility for the attack, but Dick said there was no evidence at this stage that it was “directed or enabled by anyone else”.

(Reporting by Kylie MacLellan; editing by Michael Holden, Stephen Addison and Hugh Lawson)

Europe to Britain: So long, farewell, auf Wiedersehen, adieu

ATHENS/MADRID (Reuters) – With sorrow, some support for Brexit and even hope of a return, Europeans from across the EU’s 27 remaining members bade farewell to the United Kingdom on the eve of its historic departure.

The United Kingdom leaves the European Union an hour before midnight on Friday, casting off into an uncertain future that also challenges Europe’s post-World War Two project of forging unity from the ruins of conflict.

“Farewell, bye bye my love!” said Rudolf Stockey, speaking to Reuters in German.

From across Europe, EU citizens wished the United Kingdom the best after 47 years of membership. Some expressed hopes that the British might one day return to the European fold.

“Come back. I have no idea. We are not so different,” said Madrid resident Marcos Leon.

Some expressed concern that one of Europe’s biggest powers was leaving the club.

“I am very sorry that the United Kingdom is exiting. I think it is a very, very bad thing for Europe, for the United Kingdom, for everything,” said Sara Invitto, from Milan. “Goodbye!”

“I think it’s a great waste,” said Belgian Francois Heimans, who expressed worry over populism.

But some in Greece and Poland said the British were doing the right thing.

“Have a good Brexit guys,” said Petros Papakyriakos from Greece. “They are doing what is right for their economy, and I think a lot of countries will follow their lead.”

Gdansk resident Henryk Kulesza said: “It’s good that Great Britain is leaving the European Union. It’s about time. I think that Poland should do the same thing.”

(Writing by Guy Faulconbridge; Reporting across Europe by Antonio Denti, Emily Roe, Christian Levaux, Ciara Luxton, Deborah Kyvrikosaios, Vassilis Triandafyllou, Lewis Macdonald, Dominik Starosz, Polly Rider, Ben Dadswel; Editing by Giles Elgood)

Northern Ireland prepares for momentous abortion, same-sex marriage changes

Northern Ireland prepares for momentous abortion, same-sex marriage changes
By Amanda Ferguson

BELFAST (Reuters) – Campaigners who fought for decades to end Northern Ireland’s same sex-marriage ban and restrictions on abortion prepared on Monday for a momentous change to the laws on both at the stroke of midnight.

Northern Ireland is the only part of the United Kingdom that does not allow same-sex marriage. Also, unlike England, Scotland and Wales, laws in Northern Ireland forbid abortion except where a mother’s life is at risk, bans that have been upheld by the region’s block of conservative politicians.

But an overwhelming vote by British lawmakers in July to compel the government in London to overhaul the laws if Belfast’s devolved executive had not been restored by Oct. 21 is set to kick in with little or no hope of politicians ending the local parliament’s near three-year hiatus.

Advocacy groups have planned a number of events on Monday to usher in the changes.

“We are not going to stick with the guilt and the shame any longer. Tomorrow the law changes in this place, and for the first time in Northern Ireland, women will be free,” Pro-choice campaigner Dawn Purvis told a public meeting in Belfast

“Free to choose if, when and how many children they will have in the care of health-care professionals. This is a very emotional day for many here.”

Abortion rights were long opposed in Northern Ireland by religious conservatives in both the Protestant community that supports continued British rule and the Catholic community that favours union with the traditionally Catholic Irish Republic.

Pressure has mounted, however, to change the Victorian-era laws in recent years, particularly after the neighbouring Irish Republic voted overwhelmingly last year to repeal a similarly restrictive ban, demonstrating a stark change in attitudes on an island once known for its religious conservatism.

If a new devolved government is not formed by midnight, abortion will be decriminalised, beginning a consultation on what the framework for services should look like, which is due to be finalised and approved by March 2020.

“This is a bad law being implemented through a bad process leading to bad consequences for both women and unborn children,” said Dawn McAvoy from the anti-abortion Both Lives Matter group.

Opinion has also changed on same-sex marriage. But despite opinion polls showing most in the region in favour, previous attempts to follow the Irish Republic in legalising it have been blocked by the socially conservative Democratic Unionist Party (DUP), using a special veto intended to prevent discrimination towards one community over another.

It will take the British parliament until mid-January to bring in the new legislation, setting up Feb. 14, 2020 – Valentine’s Day – as the first opportunity for same-sex couples to marry once they give the required 28-days’ notice.

(Reporting by Amanda Ferguson; Editing by Padraic Halpin, Peter Cooney and Giles Elgood)

U.S., allies urge Facebook not to encrypt messages as they fight child abuse, terrorism

By Joseph Menn, Christopher Bing and Katie Paul

WASHINGTON (Reuters) – The United States and allies are seizing on Facebook Inc’s plan to apply end-to-end encryption across its messaging services to press for major changes to a practice long opposed by law enforcement, saying it hinders the fight against child abuse and terrorism.

The United States, the United Kingdom and Australia plan to sign a special data agreement on Thursday that would fast track requests from law enforcement to technology companies for information about the communications of terrorists and child predators, according to documents reviewed by Reuters.

Law enforcement could get information in weeks or even days instead of the current wait of six months to two years, one document said.

The agreement will be announced alongside an open letter to Facebook and its Chief Executive Mark Zuckerberg, calling on the company to suspend plans related to developing end-to-end encryption technology across its messaging services.

The latest tug-of-war between governments and tech companies over user data could also impact Apple Inc, Alphabet Inc’s Google and Microsoft Corp, as well as smaller encrypted chat apps like Signal.

Washington has called for more regulation and launched anti-trust investigations against many tech companies, criticizing them over privacy lapses, election-related activity and dominance in online advertising.

Child predators have increasingly used messaging applications, including Facebook’s Messenger, in the digital age to groom their victims and exchange explicit images and videos. The number of known child sexual abuse images has soared from thousands to tens of millions in just the past few years.

Speaking at an event in Washington on Wednesday, Associate Attorney General Sujit Raman said the National Center for Missing and Exploited Children received more than 18 million tips of online child sex abuse last year, over 90% of them from Facebook.

He estimated that up to 75% of those tips would “go dark” if social media companies like Facebook were to go through with encryption plans.

Facebook said in a statement that it strongly opposes “government efforts to build backdoors,” which it said would undermine privacy and security.

Antigone Davis, Facebook’s global head of safety, told Reuters the company was looking at ways to prevent inappropriate behavior and stop predators from connecting with children.

This approach “offers us an opportunity to prevent harms in a way that simply going after content doesn’t,” she said.

In practice, the bilateral agreement would empower the UK government to directly request data from U.S. tech companies, which remotely store data relevant to their own ongoing criminal investigations, rather than asking for it via U.S. law enforcement officials.

The effort represents a two-pronged approach by the United States and its allies to pressure private technology companies while making information sharing about criminal investigations faster.

A representative for the U.S. Department of Justice declined to comment.

Susan Landau, a professor of cybersecurity and policy at the Fletcher School of Law and Diplomacy at Tufts University, said disputes over encryption have flared on-and-off since the mid-1990s.

She said government officials concerned with fighting child abuse would be better served by making sure investigators had more funding and training.

“They seem to ignore the low-hanging fruit in favor of going after the thing they’ve been going after for the past 25 years,” she said.

The letter addressed to Zuckerberg and Facebook comes from U.S. Attorney General William Barr, UK Secretary of State for the Home Department Priti Patel and Australian Minister of Home Affairs Peter Dutton.

“Our understanding is that much of this activity, which is critical to protecting children and fighting terrorism, will no longer be possible if Facebook implements its proposals as planned,” the letter reads.

“Unfortunately, Facebook has not committed to address our serious concerns about the impact its proposals could have on protecting our most vulnerable citizens.”

WhatsApp’s global head Will Cathcart wrote in a public internet forum https://news.ycombinator.com/item?id=21100588 on Saturday that the company “will always oppose government attempts to build backdoors because they would weaken the security of everyone who uses WhatsApp including governments themselves.”

That app, which is already encrypted, is also owned by Facebook.

(Reporting by Joseph Menn and Katie Paul in San Francisco and Christopher Bing in Washington; Editing by Lisa Shumaker)