Pfizer Says Experimental COVID-19 Vaccine Is More Than 90% Effective
Pfizer’s experimental COVID-19 vaccine appears to be working. The vaccine was found to be more than 90% effective, according to clinical results released by the company Monday. That news comes from an interim analysis of a study involving 43,538 volunteers, 42% of whom had “diverse backgrounds.” Each participant got two injections spaced 21 days apart.
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