Fourth Pfizer Shot Boosts Protection From Covid, Study Shows - BNN

A fourth dose of Pfizer Inc.’s Covid-19 vaccine improves protection against infection and severe illness, according to an Israeli study.

A health worker displays a vial of the Pfizer-BioNTech Covid-19 vaccine at Sheba medical center, in Ramat Gan, Israel, on Friday, Dec. 31, 2021. Israels Health Ministry has approved a fourth dose of … [+1512 chars]

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