Influenza Vaccination Coverage and Intent for Vaccination, Adults 18 Years and Older, United States

Adult Flu Vaccination Coverage

Weekly estimates of influenza vaccination coverage and intent for vaccination among adults are calculated using data from the National Immunization Survey–Adult COVID Module (NIS–ACM). The NIS–ACM is an ongoing random-digit-dial cellular telephone survey of households with adults 18 years and older. All estimates are based upon self-reported receipt of vaccination and month of that vaccination.

The NIS–ACM data posted on the dashboard below are currently a few days behind the data that are posted on the Respiratory Illnesses Data Channel. This lag is due to the time it takes to review data by geographic and sociodemographic characteristics and summarize the findings.

• Figure 4A. Influenza Vaccination Coverage, Overall and by Selected Demographics and Jurisdiction, Among Adults 18 Years and Older, 2021–22 Through 2024–25*^{,†,‡,§,±}. Data Source: National Immunization Survey–Adult COVID Module.

• Figure 4B. Weekly Influenza Vaccination and Intent for Vaccination^{^}, Overall and by Selected Demographics and Jurisdiction, Among Adults 18 Years and Older, 2023–24 and 2024–25*^{,†,‡,§,±}. Data Source: National Immunization Survey–Adult COVID Module.

Download Data for Figures 4A & 4B

• Figure 4C. Weekly Cumulative Influenza Vaccination Coverage Map and Comparison Between 2024–25 and 2023–24 by Jurisdiction, Adults 18 Years and Older, United States*^{,†,‡,§,¥}. Data Source: National Immunization Survey–Adult COVID Module.

Download Data for Figure 4C

• Figure 4D. Differences in Cumulative Influenza Vaccination Coverage by Selected Demographics and by Season, Adults 18 Years and Older, United States*^{,†,‡,§,±}. Data Source: National Immunization Survey–Adult COVID Module.

Download Data for Figure 4D

^{Note: Confidence Intervals (CIs) describe the level of uncertainty around an estimate because a sample was taken. 95% CIs represent the range of values that would result if the data collection had been repeated many times. For a 95% confidence interval, if the sampling method is repeated many times, the true value would fall within this interval at least 95% of the time. Wider CIs reflect larger random error in estimates resulting from survey sampling.}

^{Estimates from the NIS–ACM may differ from estimates based on other data sources, and in addition to random error associated with taking a sample, are subject to errors resulting from incomplete sample frame (exclusion of households without cell phones), selection bias (survey respondents may be more likely to be vaccinated than non-respondents), and errors in self-reported vaccination status. Estimates are weighted to selected sociodemographic characteristics of the U.S. population to reduce possible bias from incomplete sample frame and selection bias.}

^{*National estimates include 50 states, Washington D.C., Guam, Puerto Rico, and U.S. Virgin Islands (included in 2021, 2023, and 2025 calendar years). The Office of Intergovernmental and External Affairs hosts 10 Regional Offices that directly serve state and local organizations; information about Regions and which states are included in each region is available.}

^{†Vaccination coverage estimates are based on all interviews through the current week and represent approximately the cumulative percent vaccinated by mid-week. Each week, estimates for prior weeks are recalculated using the additional interviews conducted that week (combined with all previous interviews).}

^{‡The current season's weekly estimates can be compared directly to the previous (2023–24) season's weekly estimates. Weekly estimates should not be directly compared to monthly estimates from the 2021–22 and 2022–23 seasons.}

^{§Cumulative vaccination coverage estimates are suppressed when the cumulative sample size is <30 or current week sample size is <5. Vaccination intent estimates for a given week are suppressed when the sample size for that week is <30.}

^{±The 'Multiple or Other Races, Non-Hispanic' category includes non-Hispanic persons who selected multiple races or a race other than American Indian/Alaskan Native, Asian, Black, Native Hawaiian or other Pacific Islander, or White.}

^{^Estimates for vaccination intent are based on interviews conducted during that week and are adjusted to the cumulative vaccination coverage estimate for that week.}

^{¥Interpretation of the difference between current minus previous season is based on the 95% confidence interval (CI) of the difference. The interpretation is "Similar to last season" if the 95% CI for difference overlaps with zero; "Lower than last season" if the entire 95% CI for the difference is below zero; and "Higher than last season" if the entire 95% CI for the difference is above zero.}