Health officials in Los Angeles County have declared a community-wide outbreak of hepatitis A following a sharp rise in cases, including among people with none of the traditional risk factors.

LOS ANGELES (KABC) — Public health officials have declared a Hepatitis A outbreak in Los Angeles County with cases on the rise and elevated levels of the virus in wastewater. L.A. County ...

Los Angeles has declared an outbreak of hepatitis A virus based on “elevated virus levels” in wastewater surveillance and a “sustained increase” in cases over the last year, health ...

In 2024, there were 165 confirmed hepatitis A cases in L.A. County, which is three times more than the prior year. A total of 29 cases have been confirmed in 2025 so far, officials said.