It could crash worse than the first, killing tens of thousands of people who did such a good job of sheltering in place they remain virgin ground for the virus. Or it could be a mere swell, with so many people having been infected without symptoms that levels of immunity are higher than realized.Are people who've had COVID-19 immune? How long does immunity last? Will the virus play out like influenza and the common cold, peaking during cooler months and falling during warmer ones? Is its deadly path undeterred whatever the weather?Until there’s a vaccine “it’s unfortunately not unlikely that we may see a second wave or even a third wave,” said Peter Marks, director of the U.S. Food and Drug Administration’s Center for Biologics Evaluation and Research, which oversees vaccines. He spoke on a call with reporters about vaccine development organized by the Commonwealth Fund.
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