Prevalence of antibodies against hepatitis A

Estimates of prevalence of antibody to hepatitis A virus (anti-HAV IgG), a marker of previous HAV infection, are based on a systematic literature review conducted for the period of 1990 to 2005. In addition, anti-HAV prevalence might vary within countries by subpopulation and locality. As used on this map, the terms "high," "medium," "low," and "very low" endemicity reflect available evidence of how widespread HAV infection is within each country, rather than precise quantitative assessments.