Who is most at risk for acquiring hepatitis A virus (HAV) infection?

People who are at increased risk for acquiring HAV infection include the following:

• Travelers to countries that have high or intermediate endemicity of HAV infection
• Men who have sex with men (MSM)
• Users of injection and non-injection drugs (in other words, all who use illegal drugs)
• People with occupational risk of exposure (those who work with HAV-infected non-human primates or researchers handling hepatitis A virus)
• People who anticipate close contact with an international adoptee coming from a country with high or intermediate endemicity of HAV infection
• People living with HIV infection
• People experiencing homelessness, including temporary shelters and other unstable living arrangements
• People living in group settings for those with developmental disabilities and other settings where hygiene is difficult to maintain
• People who are incarcerated