The influenza epidemic.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007008:Hypokalemia / Q000150:complications; D007223:Infant; D007251:Influenza, Human / Q000097:blood* / Q000150:complications; D008875:Middle Aged; D011188:Potassium / Q000097:blood*
D011188:Potassium