Two doses of the Pfizer/BioNTech mRNA COVID-19 vaccine were highly effective in preventing coronavirus-related infections and severe outcomes, according to two new studies from Israel and one from the United States.Effectiveness in older people, against B117In the first study, published yesterday in The Lancet, researchers from the Israel Ministry of Health and Pfizer used national disease surveillance data to track COVID-19 cases and vaccine uptake in residents 16 years and older who had received their second doses at least 7 days before in the first 4 months after a nationwide vaccination campaign.
The B117 variant first identified in the United Kingdom was dominant at the time.The observational study identified 232,268 COVID-19 cases,