Influenza in families.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis; D005260:Female; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D007251:Influenza, Human / Q000235:genetics* / Q000276:immunology; D008297:Male; D008875:Middle Aged
D000914:Antibodies, Viral