A man was reinfected with COVID. What does that mean for immunity? – Sydney Morning Herald

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The man was travel weary. He was returning home, finally, from a long trip Spain via Britain. Hong Kong airport, as with most major airports these days, has a rigorous COVID-19 screening program for anyone passing through. The man queued up to be throat-swabbed, perhaps with a little impatience. He did not feel sick. He had no fever, no cough.
And besides, he couldnt have COVID-19. Hed already had COVID-19. He spent two weeks in hospital bac…

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