New US laws on childhood vaccines.
Frankel
D H
DH
D002648:Child; D002675:Child, Preschool; D004608:Eligibility Determination; D006801:Humans; D007223:Infant; D014481:United States; D014611:Vaccination / Q000191:economics / Q000331:legislation & jurisprudence*; D014612:Vaccines / Q000191:economics*
D014612:Vaccines