Vaccine Efficacy

Vaccine efficacy after 2 doses was 94.1% in preventing symptomatic, laboratory-confirmed COVID-19 among persons without evidence of previous SARS-CoV-2 infection.

High efficacy (≥86%) was observed across age, sex, race, and ethnicity categories and among persons with underlying medical conditions.

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The Advisory Committee on Immunization Practices’ Interim Recommendation for Use of Moderna COVID-19 Vaccine — United States, December 2020


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Page last reviewed: September 27, 2021