Pfizer's CEO says Covid vaccine effectiveness drops to 84% after six months
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Pfizer's vaccine initially protects people 100% of the time against hospitalization, but that falls to low 90% and mid-to-high 80% after...
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Pfizer's vaccine initially protects people 100% of the time against hospitalization, but that falls to low 90% and mid-to-high 80% after...
Full ArticleJERUSALEM (AP) — Israeli health authorities began administering coronavirus booster shots Friday to people over 60 who've already..