My four-month-old son received a shot for DTaP-IPV/Hib vaccine (Pentacel®). Due to my family emergency, my infant needs to be out of the States for up-to a year. We want to make sure that he gets vaccine on the schedule as much as possible. However, there is no Pentacel over there. Therefore, doctor shots him a vaccine from other company. Will be any problem with that if we switch back-and-forth when he get back here in the US? My question is for the vaccine in general from infant to toddler years not just Pentacel.
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