Rates^* of reported cases^† of hepatitis A virus infection, by age group — United States, 2005-2020

The rates of hepatitis A decreased in all age groups during 2005–2009 and remained constant from 2010 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, except persons aged younger than 20 years, which is consistent with the introduction of the hepatitis A vaccine in 1996 and the gradual expansion to a universal childhood vaccination recommendation in 2006. In 2020, the rates of reported cases of hepatitis A were highest among persons aged 30-39 years and decreased in all age groups compared to 2019 rates.