HPV vaccine less effective in "older" women.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002170:Canada; D005260:Female; D000068857:Human Papillomavirus Recombinant Vaccine Quadrivalent, Types 6, 11, 16, 18; D006801:Humans; D008875:Middle Aged; D030361:Papillomavirus Infections / Q000517:prevention & control*; D053918:Papillomavirus Vaccines / Q000008:administration & dosage*; D014481:United States; D055815:Young Adult
D000068857:Human Papillomavirus Recombinant Vaccine Quadrivalent, Types 6, 11, 16, 18; D053918:Papillomavirus Vaccines