Thứ Sáu, 24 tháng 7, 2020

NPR News: Without A Vaccine, Researchers Say, Herd Immunity May Never Be Achieved

Without A Vaccine, Researchers Say, Herd Immunity May Never Be Achieved
A growing number of researchers think until there's an effective vaccine, the coronavirus will simply persist in the population, causing illness indefinitely. Better to squelch the spread instead.

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