title: Preliminary serologic studies of antibody to hepatitis A virus in populations in the United States.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000914:Antibodies, Viral / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006514:Hepatitis B Surface Antigens; D006507:Hepatovirus / Q000276:immunology*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012959:Socioeconomic Factors; D013781:Texas
chemical_list: D000914:Antibodies, Viral; D006514:Hepatitis B Surface Antigens