At a glance
Rates* of reported cases† of hepatitis A, by age group — United States, 2006–2021
Source: CDC, National Notifiable Diseases Surveillance System.
* Rates per 100,000 population. Beginning in 2021, single-race population estimates are used for rate calculations. For prior years, bridged-race population estimates are used.
† Reported confirmed cases. For the case definition, see .
Summary
Since 2006, the rates of hepatitis A decreased in all age groups and remained constant until outbreaks of hepatitis A began to be reported during 2016. The substantial increase in the rates of hepatitis A observed during 2017–2019 was apparent in almost all age groups. The exception was for persons aged less than 20 years, which is due to the introduction of hepatitis A vaccine in 1996 and universal childhood vaccination recommendation in 2006.
In 2021, the rate of reported cases of hepatitis A either decreased or stayed the same in nearly all age groups compared to 2020. In 2021, the highest rate occurred among persons aged 30–39 years (3.9 per 100,000 population).