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Dec 08, 2020 AM EST
Having second thoughts on taking vaccines? Here's how it works.
Sep 23, 2020 PM EDT
Two-thirds of the Manaus' population have been infected with the coronavirus and as a result, the city may have reached herd immunity
Aug 06, 2020 AM EDT
A new study proposes that nations that mandated bacillus Calmette-Guerin or BCG vaccination at least up to 2000 appear to have developed a degree of 'herd immunity" in contrast to COVID-19.
