Scientists are still studying the possibility of reinfection and immunity in COVID-19.
In a study released on Monday — the first of its kind — a team led by researchers from King’s College London said patients who recover from coronavirus infections might lose immunity to reinfection within months.
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WHO emergencies director Michael Ryan said it was not yet known whether recovered COVID-19 patients could be infected again, but “with other coronaviruses, that is the case”.
WHO COVID-19 technical lead Maria Van Kerkhove said more studies were needed.
While those infected did mount some level of an immune response through antibodies, “what we don’t know is how strong that protection is, and for how long that protection will last”, she said.
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The WHO said that there was currently “no evidence” that people who have recovered from COVID-19 and have antibodies are protected from a second coronavirus infection.
“There is currently no evidence that people who have recovered from COVID-19 and have antibodies are protected from a second infection,” it said.
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