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Pfizer, BioNTech say Covid vaccine is more than 90% effective—'great day for science and humanity'
Pfizer and BioNTech announced Monday their coronavirus vaccine was more than 90% effective in preventing Covid-19 among those without evidence of prior infection, hailing the development as “a great day for science and humanity.” “I think we can see light at the end of the tunnel,” Pfizer Chairman and CEO […]
