About The Study: This study evaluated the response to a third and fourth Pfizer-BioNTech COVID-19 vaccine dose among individuals age 60 or older in Israel by evaluating antispike immunoglobulin G antibody titers before and after each dose. This population is at high risk of developing severe SARS-CoV-2 disease and was the first to receive authorization for a third and fourth vaccine dose.
Authors: Noa Eliakim-Raz, M.D., of Beilinson Hospital in Petah Tikva, Israel, is the corresponding author.
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