Alliance for Pandemic Preparedness

March 15, 2021

COVID-19 Vaccine Second-Dose Completion and Interval Between First and Second Doses Among Vaccinated Persons — United States, December 14, 2020-February 14, 2021

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  • Vaccination data reported to CDC indicate that among people who received the first dose of either the Moderna or Pfizer/BioNTech vaccines as of February 14, 2021, and for whom enough time had elapsed to receive the second dose, 88.0% had completed the series and 8.6% had not received the second dose. Among all people who received 2 doses, 95.6% received the second dose within the recommended time interval (Pfizer-BioNTech 1-25 days and Moderna 24-32 days since the first dose). The percentage of people who missed the second dose varied by geographic area (range = 0.0%−9.1%).

Kriss et al. (Mar 15, 2021). COVID-19 Vaccine Second-Dose Completion and Interval Between First and Second Doses Among Vaccinated Persons — United States, December 14, 2020-February 14, 2021. MMWR. Morbidity and Mortality Weekly Report. https://doi.org/10.15585/mmwr.mm7011e2