title: [Do antigenic variants of the hepatitis A virus exist?].
mesh_terms: D000956:Antigens, Viral / Q000032:analysis*; D005243:Feces / Q000032:analysis; D014644:Genetic Variation; D006507:Hepatovirus / Q000276:immunology*; D006801:Humans
chemical_list: D000956:Antigens, Viral
vernacular_title: Sushchestvuiut li antigennye varianty virusa gepatitia A?