Vaccine preparedness, or not.
D000368:Aged; D004340:Drug Contamination; D006801:Humans; D007223:Infant; D007252:Influenza Vaccines / Q000600:supply & distribution*; D007251:Influenza, Human / Q000517:prevention & control; D012307:Risk Factors; D006113:United Kingdom; D014481:United States
D007252:Influenza Vaccines