Rates^* of reported cases^† of Hepatitis A virus infection, by age group — United States, 2006–2021

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).