Struggling with the flu.
D000368:Aged; D005260:Female; D006801:Humans; D007252:Influenza Vaccines / Q000191:economics / Q000592:standards / Q000600:supply & distribution*; D007251:Influenza, Human / Q000517:prevention & control*; D011634:Public Health / Q000191:economics / Q000592:standards*; D014481:United States; D014483:United States Dept. of Health and Human Services / Q000331:legislation & jurisprudence
D007252:Influenza Vaccines