WINTER epidemics.
D035843:Biomedical Research; D001699:Biometry; D058872:Epidemics; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control* / Q000706:statistics & numerical data*; D012621:Seasons
INFLUENZA/epidemiology and statistics; INFLUENZA/prevention and control