Monthly Cumulative Influenza Vaccination Coverage Among Pregnant Persons, United States, 2019-2020 Compared with 2020-2021.
• These monthly flu vaccination coverage estimates for pregnant persons are based on electronic health record (EHR) data from the Vaccine Safety Datalink (VSD), a collaboration between CDC’s Immunization Safety Office and nine integrated health care organizations. This system has been used annually to estimate vaccination coverage among pregnant persons.