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The conclusion, announced on Friday, is expected to stabilize some 51 million people around the world, particularly those infected in recent months. “This is great news, because we can be sure that, at least in the short term, most people who have had Covid-19 will not get it again,” commented David Eyre, professor in the Nuffield Department for Human Health. of Oxford, who co-produced the study.
Mike Ryan, head of the World Health Organization for Pandemics, also welcomed the disclosure of the study. “So far we are seeing sustained immune responses among human populations,” he commented. “It also gives us hope for the vaccine.”
Maria van Kerkhove, who technically leads the WHO in the fight against the coronavirus, said that “we will still have to follow these people for a long time to see how long their immunity lasts”.
The study appears to counter on a large scale some isolated cases of SARS-CoV-2 reinfection already recorded and which admitted the possibility that immunity to the coronavirus was short-lived and that recovered patients could become ill again in a short time.
Cases of reinfection should remain a possibility but rare, the study indicates.
During the survey, 89 of the 11,052 people without antibodies studied developed a new infection without symptoms, something that did not occur with any of the 1,246 with antibodies tested. These employees were also less likely to test positive for Covid-19 without symptoms, with 76 positive tests without antibodies compared to just three of those who already had immunity. These three are also all fine and have had no symptoms, the researchers said.
The study continues.
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