Rapid risk assessment : multi-country outbreak of hepatitis A in the EU/EEA : 18 June 2025

Between January and May 2025, Austria, Czechia, Hungary, and Slovakia reported a higher-than-expected number of hepatitis A virus (HAV) subgenotype IB cases. Two clusters involving two closely related HAV subgenotype IB strains were identified from sequence data from four countries (Austria, Germany, Hungary and Slovakia). This rise in HAV infections is primarily affecting adults experiencing homelessness, individuals who use or inject drugs, and those living in poor sanitary conditions. Additionally, cases have been reported among members of the Roma communities in both Czechia and Slovakia.