What is the best age to give the second dose of MMR vaccine?
The second dose of MMR can be given anytime, as long as the child is at least 12 months old and it has been at least a month since the first dose. However, the second dose is usually administered before the child begins kindergarten or first grade (4-5 years of age) or before entry to middle school (11-12 years of age). The age at which the second dose is required is generally mandated by state school entry requirements.
