Influenza Vaccination Coverage, Pregnant Women, United States

Pregnant Women Flu Vaccination Coverage

Weekly influenza vaccination coverage estimates for pregnant women ages 18–49 years are based on electronic health record (EHR) data from the Vaccine Safety Datalink (VSD), a collaboration between CDC's Immunization Safety Office and multiple integrated health care organizations.*

The denominator includes women with a pregnancy during the current flu season (defined as August through March) beginning before or during the specified week. The numerator includes those who received a flu vaccine since July 1 of the respective flu season before or during pregnancy as of the specified week ending date. Pregnant women are not removed from the numerator or denominator when the pregnancy ends. Cumulative vaccination coverage for one week may be lower than cumulative coverage for a previous week due to the addition of pregnant women in the denominator.^† Additionally, no requirements for length of enrollment in a VSD site are applied, and vaccinations given outside of a VSD site might not be included.^‡

• Figure 3A. Percent of Pregnant Women Ages 18–49 Years Who Have Received an Influenza Vaccine Overall, by Race and Ethnicity, and Season. Data Source: Vaccine Safety Datalink.
• Figure 3B. Percent of Pregnant Women Ages 18–49 Years Who Have Received an Influenza Vaccine by Week, Race and Ethnicity, and Season. Data Source: Vaccine Safety Datalink.

Download Data for Figures 3A & 3B

^{Note: Monthly influenza vaccination data from prior seasons have been archived and can be accessed using the following link: 2023-24 Influenza Vaccination Coverage, Pregnant Persons. Archived data are based on 8 reporting sites whereas data on this dashboard include 10 reporting sites for all seasons.}

^{*Naleway AL, Crane B, Irving SA, et al. Vaccine Safety Datalink infrastructure enhancements for evaluating the safety of maternal vaccination. Ther Adv Drug Saf. 2021, Jun 14.}

^{†The coverage estimate for any given week may change as the season progresses.}

^{‡Estimates presented here might underestimate flu vaccination coverage among women enrolled in the VSD sites. For example, in an analysis conducted after the 2023–24 season in August 2024 that allowed for more time to capture vaccine administrations in electronic health records and was restricted to women with continuous enrollment at a VSD site from August 1 2023–March 31, 2024, coverage increased from the 38.1% to 45.1%.}