As of May 2021, 16% of pregnant people identified in CDC’s Vaccine Safety Datalink had received ≥1 dose of a COVID-19 vaccine during pregnancy in the U.S. Vaccination was lowest among Hispanic people (12%), non-Hispanic Black people (6%), and people aged 18-24 years (6%), and highest among non-Hispanic Asian people (25%) and people aged 35-49 years (23%).