Governments should not issue so-called “immunity passports” or “risk-free certificates” as a way of easing lockdowns, the World Health Organization (WHO) says.
It said there was “no evidence” that people who had developed antibodies after recovering from the virus were protected against a second infection.
Such a move could actually increase virus transmission, it warned.
People who assumed they were immune might stop taking precautions, it said.
Some governments have considered permitting people who have recovered to travel or return to work.
Restrictions imposed on movement to stop the virus spreading have crippled economies around the world.
More than 2.8m cases of the virus have been confirmed worldwide and nearly 200,000 people have died.
What did the WHO say?
“There is currently no evidence that people who have recovered from Covid-19 and have antibodies are protected from a second infection,” the WHO said in a briefing note.
Most studies carried out so far showed that people who had recovered from infection had antibodies in their blood – but some of these people had very low levels of antibodies.
This suggested that another part of the body’s immune response – T-cells, which eliminate infected cells – may also be “critical” for recovery.
As of Friday no study had evaluated whether the presence of antibodies to the virus conferred immunity to subsequent infection by the virus in humans, the WHO said.
“At this point in the pandemic, there is not enough evidence about the effectiveness of antibody-mediated immunity to guarantee the accuracy of an ‘immunity passport’ or ‘risk-free certificate’,” it said.
The organisation also said laboratory tests to detect antibodies needed further validation to determine their accuracy and also needed to distinguish between previous infection by the SARS-CoV-2 virus – which has caused the pandemic – and the six other known coronaviruses in circulation.
Passports too risky – for now
Analysis
The WHO’s guidance is based on evidence from researchers all around the world. But it could well change as we rapidly learn more about this virus.
There isn’t currently any evidence to suggest having had the virus once protects you from getting it again. So the idea of an “immunity passport”, allowing people who test positive for antibodies to have fewer restrictions, would be a very risky one.
Many countries including Germany, Italy and the UK are beginning to test samples of their populations for antibodies. In the UK, 25,000 people will be tested every month for the next year – both for antibodies, and to check if they currently have the virus.
This could provide more information about whether (and for how long) the disease confers immunity to those who have recovered. And that would give us a clearer idea about whether testing individuals and giving them some kind of immunity status might be an option in the future.
Where are ‘immunity passports’ being considered?
Last week Chile said it would begin issuing “health passports” to people deemed to have recovered from the illness.
Once screened for the presence of antibodies to make them immune to the virus, they could rejoin the workforce, officials said.
In Sweden, which has chosen to keep large parts of society open, some scientists believe people may end up with much higher immunity levels compared with those living under stricter regulations.
However Anders Wallensten from the Swedish Public Health Agency told the BBC that not enough was yet known about immunity.
“We will know more as more people are tested for antibodies, but also the more time goes on, and if more accounts of re-infection etcetera are reported,” he said.
In Belgium, which has one of the highest death rates per capita but is planning to gradually relax lockdown restrictions from 11 May, a government adviser told the BBC he strongly opposed the idea of immunity passports.
“I abhor the fact that we would give people passports, a green one or a red one, depending on their serology status,” said virologist Professor Marc Van Ranst, a member of the Belgian government’s Risk Assessment Group and Scientific Committee on the Coronavirus.
“That will lead to forgeries, that will lead to people wilfully infecting themselves to the virus. This is just not a good idea. It is an extremely bad idea.”
Earlier this week Professor Mala Maini from University College London said reliable antibody tests were urgently needed to determine how long antibodies persisted and whether they conferred protection.
“We’re not yet sure if these antibodies indicate protective immunity against SARS-CoV-2 but preliminary data suggest they may be a reasonable proxy for this – so they are being considered to inform release from lockdown etc,” she said.
Foreign
Israel’s War On Gaza: List of Key Events, Day 101

Dozens of Palestinians killed in overnight Israeli strikes in central and south Gaza as Red Sea tensions rise.
Here’s how things stand on Monday, January 15, 2024:
Latest updates and human impact
- Israeli attacks continue unabated overnight killing and wounding dozens of civilians in central and southern Gaza. At least 22 people were killed and a large number injured as a result of Israeli forces targeting al-Thalatheni Street in the central Gaza Strip.
- Yemen’s Houthi rebels fired an antiship cruise missile toward an American destroyer in the Red Sea, which was shot down by a US fighter jet, announced US Central Command (CENTCOM) on X.
- This was the first US-acknowledged Houthi attack since the US strikes on Yemen on Friday.
- Hamas released a 37-second video showing three Israeli captives held in Gaza on Sunday, saying they would reveal the fate of the captives on Monday and urging the Israeli government to stop the offensive.
- The Israeli military says it has shifted to a new phase of the war focused on the southern end of Gaza, where almost 2 million internally displaced Palestinians are running out of safe spaces to shelter.
- The Gaza Ministry of Health has said almost 24,000 people have been killed in the Israeli offensive. More than 60,000 people have been wounded in 100 days of war.
Diplomacy
- Israeli Prime Minister Benjamin Netanyahu said on Sunday that his country will pursue its war against Hamas until victory and will not be stopped by anyone, including the International Court of Justice (ICJ).
- The White House said on Sunday that “it’s the right time” for Israel to scale back its military offensive in the Gaza Strip.
- Egypt’s State Information Service (SIS) said in a statement on Sunday that one of the biggest obstacles to the timely delivery of sufficient aid to Gaza was Israeli inspection of the aid. The statement came after Israel blamed Cairo for the delay in aid delivery to Gaza during its defence at the ICJ.
- US Secretary of State Antony Blinken posted on X on Monday, calling for the release of the remaining captives held in Gaza on the 100th day since they were taken by Hamas. He did not mention the Palestinian casualties.
- Australia’s Foreign Minister Penny Wong, who described herself as a “friend of Israel” to the press, will travel to Jordan, Israel, the occupied Palestinian Territories and the United Arab Emirates this week, her office said on Monday.
West Bank raids and violence
- Israeli forces arrested 25 students staging a sit-in in protest against high tuition fees at An-Najah University in Nablus. Al Jazeera’s Hamdah Salhut reported that the protesting students received a text message from Israeli forces telling them to “surrender now”.
- Israeli forces have reportedly raided the family home of Nael al-Barghouti, the longest-serving Palestinian prisoner, in the village of Kobar, in Ramallah, in the occupied West Bank.
- The Israeli army said on Friday that it killed three Palestinian men who infiltrated a West Bank settlement and fired upon soldiers.
- The Israeli military killed two Palestinians after accusing them of ramming their car through a checkpoint near Hebron.
- Local sources reported that Israeli forces bulldozed two Palestinian-owned houses during a Sunday midnight raid in the city of Qalqilya, Palestinian news agency Wafa reported.
- Armed Israeli settlers broke into the village of Burin, south of Nablus, and attacked Palestinian residents’ houses and properties after midnight on Sunday, Wafa reported.
- “Violent raids and arrests have become part of the fabric of daily life in the occupied West Bank,” Al Jazeera’s Mohammed Jamjoom, reporting from Ramallah in the occupied West Bank, said. At least 347 Palestinians have been killed and thousands have been arrested since October 7.
Foreign
Hamas Says Will Kill Hostages if Israeli Attacks On Gaza Civilians Continue

Flames and smoke billow during Israeli attacks against Gaza on October 9, 2023
Human Rights Watch terms Israeli Defence Minister Yoav Gallant’s call for a ‘complete siege’ on Gaza a ‘war crime’.
The Hamas movement has threatened to kill an Israeli hostage every time Israel bombs a Palestinian home without warning as Israel mobilised some 300,000 reservists and imposed a total blockade of the Gaza Strip, denying the enclave’s millions of residents access to food, water and fuel.
The warning from Hamas came on Monday as the death toll from the armed group’s surprise weekend attack climbed to 900 in Israel and revenge attacks by Israeli forces on the besieged Gaza Strip killed more than 700 people and left some 3,700 others wounded.
Residential apartment blocks, hospitals, schools and a mosque have been among the sites attacked by Israeli fighter jets, artillery and drones, according to media reports and witnesses.
Hamas spokesperson Abu Ubaida issued the threat to kill Israelis from the dozens held captive by the armed group. He said an Israeli hostage would be killed for every Israeli bombing of a civilian house without warning.
Israeli Foreign Minister Eli Cohen said more than 100 people were taken captive by Hamas during the deadly cross-border incursion over the weekend.
As Israeli forces conducted intense retaliatory attacks on Gaza on Monday, Israel’s Defence Minister Yoav Gallant drew international condemnation by announcing a total blockade of the densely populated and besieged enclave, which is home to 2.3 million people.
Gallant said Israel would impose a “complete siege” on Gaza. “No electricity, no food, no water, no gas – it’s all closed.”
United Nations Secretary-General Antonio Guterres said he was “deeply distressed” by the siege announcement and warned that Gaza’s already dire humanitarian situation will now “only deteriorate exponentially”.

Guterres also said some 137,000 people were taking shelter with the UN Relief and Works Agency for Palestinian Refugees (UNRWA) at schools across Gaza.
UNRWA said on Tuesday that almost 190,000 people have been displaced in Gaza amid the Israeli attacks and the figure is expected to grow further as the violence intensifies.
Nearly half a million people have also not received food rations this week in Gaza as UN food distribution centres have been forced to remain closed amid the Israeli onslaught, UNRWA said.
Human Rights Watch said Israel’s total blockade on the necessities of life for everyday people in Gaza was a war crime.
“Defense Minister Gallant’s statements are abhorrent,” Omar Shakir, Israel and Palestine director at Human Rights Watch, said in a statement.
“Depriving the population in an occupied territory of food and electricity is collective punishment, which is a war crime, as is using starvation as a weapon of war. The International Criminal Court should take note of this call to commit a war crime,” he said.
Abhorrent. This is a call to commit a war crime by @yoavgallant. The @IntlCrimCourt should take note.
Quote by @OmarSShakir ⤵️ https://t.co/kKVo6YtpI1 pic.twitter.com/neHQMwnXVn
— Human Rights Watch (@hrw) October 9, 2023
Shakir also condemned the threat by Hamas to kill hostages, warning that such action was also a war crime.
“All hostages should be safely released to their families,” he said.
Grotesque. These threatened acts would amount to flagrant war crimes by Hamas’ armed wing. The @IntlCrimCourt will be watching.
Quote from @OmarSShakir ⤵️ https://t.co/FuNtvHe0YG pic.twitter.com/6cnHODLWyZ
— Human Rights Watch (@hrw) October 9, 2023
On the diplomatic front, Egyptian President Abdel Fattah el-Sisi and his Turkish counterpart Recep Tayyip Erdogan called on Hamas and Israel to immediately end violence and protect civilians, the Egyptian presidency said.
Erdogan urged Israel against “indiscriminately” attacking civilians and delivered measured criticism of Hamas, urging both sides to respect the “ethics” of war.
The United Kingdom, French, German, Italian and US governments issued a joint statement on Monday recognising the “legitimate aspirations” of the Palestinian people and supporting equal measures of justice and freedom for Israelis and Palestinians alike.

But the prospect that fighting could spread also alarmed the region and the world.
Lebanese armed group Hezbollah fired rockets into northern Israel in response to at least three of its members being killed in Israeli shelling of Lebanon.
Israel said one of its deputy commanders was also killed in an earlier cross-border raid from Lebanon.
Foreign
Western Leaders Accused of Hypocrisy Over Response To Palestine, Ukraine

US President Joe Biden holds a bilateral meeting with Israeli Prime Minister Benjamin Netanyahu on the sidelines of the 78th United Nations General Assembly in New York City, the US, September 20, 2023
Social media users, including journalists and observers, are calling out what they call a ‘double standard’.
After Saturday’s surprise attack by the Palestinian group Hamas on Israel, Ukrainian President Volodymyr Zelenskyy took to the social media platform X to offer “condolences go out to everyone who lost relatives or close ones in the terrorist attack”.
He also stated, “Israel’s right to self-defence is unquestionable.”
Many world leaders, including US President Joe Biden and UK Prime Minister Rishi Sunak, shared similar sentiments.
The world is seeing appalling images.
Thousands of rockets raining down on Israeli cities. Hamas terrorists killing not only Israeli soldiers, but civilians on the streets and in their homes.
It’s unconscionable. Israel has a right to defend itself – full stop.
— President Biden (@POTUS) October 7, 2023
European Commission President Ursula von der Leyen stated, “Israel has the right to defend itself – today and in the days to come. The European Union stands with Israel.”
Accusations of Western ‘double standards’
Some social media users have criticised these statements, saying they highlight a double standard.
The world is seeing appalling images.
Thousands of rockets raining down on Israeli cities. Hamas terrorists killing not only Israeli soldiers, but civilians on the streets and in their homes.
It’s unconscionable. Israel has a right to defend itself – full stop.
— President Biden (@POTUS) October 7, 2023
Ukraine’s right to defend itself is praised by most international leaders while Russia’s invasion is condemned, but commentators said the same cannot be said about Israel’s occupation of the West Bank and Gaza.
Aaron Bastani, a leftist British journalist, said on X that there’s a “clear double standard in endorsing terrorism against civilian targets in Ukraine … and condemning it by Palestinians”.
Many users said Western diplomats and media support the Ukrainians who defend their land, but label the Palestinians fighting against Israel as “terrorists”.
https://twitter.com/KhaledBeydoun/status/1710787817415082349?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710787817415082349%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine
An illustration of a woman’s face, in which one eye is closed beside a Palestinian flag, and one eye open beside a Ukrainian flag, has been regularly shared as a symbol of the West’s alleged double standards in how the two conflicts are viewed.
https://twitter.com/OnlinePalEng/status/1710994682883273172?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710994682883273172%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine
Clips also emerged on social media from a CNN interview with Mustafa Barghouti, the general secretary of the Palestinian National Initiative, in which he posed the rhetorical question, “Why does the United States support Ukraine in fighting occupation – while here they support the occupier, who continues to occupy us?”
The hypocrisy and double standards of western governments and media platforms dealing with situations in Ukraine-Russia and Palestine-Israel blow the mind. Absolute disgrace.
— Said Yacoubi (@AlyacoubiSaid) October 8, 2023
It is not the first time Western nations have been accused of double standards in their stance on the Ukraine war.
Earlier in the year, Amnesty International published a report highlighting the West’s “double standards” on global human rights.
Agnes Callamard, Amnesty’s secretary-general, told Al Jazeera at the time that the occupation of Palestinian territory was a “particularly important one”.
“Without making any comparison between Russia’s aggression and Israel … it is clear the Palestinian people are under a regime of oppression – a regime of occupation and a regime of apartheid,” Callamard told Al Jazeera.
Over the last three days, X users recirculated earlier statements calling out what they called Western hypocrisy, sharing video by the Irish lawmaker Richard Boyd Barrett from March 2022 in which he berated the Irish government’s double standards regarding Ukraine and Palestine:
“You’re happy to use the most strong and robust language to describe the crimes against humanity of [Russian President] Vladimir Putin, but you will not use the same strength of language when it comes to describing Israel’s treatment of the Palestinians.”
Barrett on Sunday again called out what he described as “shocking double standards of Western leaders supporting Ukraine resistance but condemning Palestinian[s].”
Meanwhile, others warned against comparing conflicts.
https://twitter.com/denfordauthor/status/1710993737738768607?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1710993737738768607%7Ctwgr%5E6acf829869e993177f32aa38aa48c02f38cb7f61%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.aljazeera.com%2Fnews%2F2023%2F10%2F9%2Fwestern-leaders-accused-of-hypocrisy-over-response-to-palestine-ukraine
And some cautioned that Hamas and the Palestinians should not be seen as one and the same.
Just to clarify:
Palestine did not mount an attack on Israel. An Iranian proxy militia did. Palestinians are by and large huddled in their homes praying that an Israeli airstrike won't kill them or theirs. Hamas is the culprit here. This isn't a decentralized grassroots thing.
— Romeo Kokriatski (@VagrantJourno) October 9, 2023
Ukrainian footballer Oleksandr Zinchenko, who plays for Arsenal, posted on Instagram, stating he “stands with Israel”.
Zinchenko has been a vocal supporter of his home country in its ongoing defence against Russia, and he participated in a Game4Ukraine charity match in London earlier this year to raise money for Ukraine.
After online backlash, with some questioning an alleged double standard in his support of Israel, the footballer removed the post and switched his social media account to private.
Several people claimed that Zinchenko’s football club, in not responding to his comments, was guilty of hypocrisy after they had distanced themselves from former player Mesut Ozil’s comments in 2019 over alleged human rights abuses against Uighur Muslims in China.
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