What is the minimum age for the first dose of MMR in routine immunization?
QUESTION
Which vaccine is routinely administered at birth to prevent perinatal transmission?
QUESTION
Which vaccine is routinely administered at ages 2, 4, and 6 months as a 3-dose primary series?
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ANSWER
Inactivated polio vaccine (IPV). This schedule establishes primary immunity against poliomyelitis during infancy when the risk of exposure is significant.