Are we being too cautious?
D002644:Chickenpox / Q000517:prevention & control*; D019433:Chickenpox Vaccine; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D014611:Vaccination; D014765:Viral Vaccines / Q000008:administration & dosage
D019433:Chickenpox Vaccine; D014765:Viral Vaccines