Pfizer Covid-19 Caccine More Than 90% Effective, Will Be …

Pfizer Covid-19 Caccine More Than 90% Effective, Will Be …

Pfizer announced that its coronavirus vaccine is more than 90 percent effective in preventing Covid-19. The medical community praised the news, but there is still a long way to go before the vaccine can reach the public. NBC News medical contributor …

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