title: Letter: Influenza A in an isolated population in the Amazon.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000302:isolation & purification; D001938:Brazil; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007199:Indians, South American; D007223:Infant; D009980:Influenza A virus / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000382:microbiology; D008875:Middle Aged
chemical_list: D000914:Antibodies, Viral