Despite the 95 percent effectiveness at preventing coronavirus infection after two doses of its vaccine, Pfizer is now seeing what a third dose might do.
http://dlvr.it/RtVDPJ
Thursday, February 25, 2021 at 12:30 PM Posted by games
Despite the 95 percent effectiveness at preventing coronavirus infection after two doses of its vaccine, Pfizer is now seeing what a third dose might do.
http://dlvr.it/RtVDPJ
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