Influenza vaccine.
D000368:Aged; D001315:Australia; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007252:Influenza Vaccines / Q000600:supply & distribution*; D007251:Influenza, Human / Q000517:prevention & control; D011247:Pregnancy
D007252:Influenza Vaccines