Influenza: basic epidemiological aspects for the development of vaccines.
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D000368:Aged; D002675:Child, Preschool; D002980:Climate; D014943:Global Health; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D011159:Population Surveillance; D012307:Risk Factors; D012621:Seasons; D014481:United States / Q000453:epidemiology
D007252:Influenza Vaccines