Are there ramifications if providers are vaccinating with the 2nd MMR at the minimum interval instead of waiting until the child is 4-6 years old?
The minimum interval between MMR-1 and MMR-2 is 28 days. As long as the doses meet minimum age and minimum intervals, the child is considered to be biologically protected. However, you should make sure this is acceptable under your state’s immunization entry school law. If not, the state may invalidate MMR-2 and require a dose on or after the 4th birthday.
