About The Study: The results of this study suggest that among children ages 5 to 11, two doses of the Pfizer-BioNTech COVID-19 vaccine provided modest short-term protection against Omicron infection that was higher for those with prior infection; however, vaccine effectiveness waned after approximately three months in all children. A booster dose restored protection against Omicron and was maintained for at least three months. These findings highlight the continued importance of booster vaccination regardless of history of prior COVID-19.
Authors: Farid L. Khan, M.P.H., of Pfizer in Collegeville, Pennsylvania, is the corresponding author.
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(doi:10.1001/jamanetworkopen.2022.46915)
