How long immunity lasts after a coronavirus infection and what that means for vaccines – The Philadelphia Inquirer

In one case, the second positive test occurred within a month of the first, so it might have been the same infection, said Jeffrey Shaman, a professor of environmental health sciences at Columbias Mailman School of Public Health. But generally, it seemed the immune system couldnt recognize, and fight off, coronaviruses it had encountered just a few months before.

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How long immunity lasts after a coronavirus infection and what that means for vaccines - The Philadelphia Inquirer

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