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Although there was a global shortage of Covid-19 vaccines in 2021, by mid 2022, the vaccine supply will no longer be a limiting factor in efforts to provide more equitable coverage. As of April 19, 2022, approximately 11.5 billion Covid-19 vaccine

On December 10, 2020, Pfizer presented results from a 36,000-person, two-dose, prospective, placebo-controlled trial of its Covid-19 messenger RNA (mRNA) vaccine, BNT162b2, to the Food and Drug Administration (FDA).1 The vaccine was 95% effective at