The age-specific prevalence of antibodies to hepatitis A virus (anti-HAV) was determined in two different population groups with low socio-economic status from Rio de Janeiro city. Brazil. whose serum samples were collected 17 years apart (Population 1. 1978; Population 2. https://toovnsiob1md.tokka-blog.com/35180583/non-communicable-diseases-and-its-risk-factors-among-the-transgender-population-in-kerala-a-cross-sectional-study