Estimated Effectiveness of COVID-19 Messenger RNA Vaccination Against SARS-CoV-2 Infection Among Older Male Veterans Health Administration Enrollees, January to September 2021.

Young-Xu, Yinong; Zwain, Gabrielle M; Powell, Ethan I; Smith, Jeremy · JAMA Netw Open · 2021

case_control · Level III

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Abstract

This case-control study examines estimated COVID-19 messenger RNA vaccination effectiveness against SARS-CoV-2 infection from January to September 2021 among fully vaccinated male veterans aged 65 years or older.

Medical subject headings