Regional variations in mortality from influenza and pneumonia.
D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D005843:Geography; D006801:Humans; D007251:Influenza, Human / Q000150:complications / Q000382:microbiology / Q000401:mortality*; D008297:Male; D008875:Middle Aged; D009975:Orthomyxoviridae; D011014:Pneumonia / Q000401:mortality*; D012737:Sex Factors; D013223:Statistics as Topic; D014481:United States