When should a child receive their first MMR vaccine?

The first MMR (measles, mumps, rubella) vaccine is typically administered between 12-15 months of age. This timing is crucial because it allows the immune system of a child to respond effectively to the vaccine after maternal antibodies, which can interfere with the vaccine's effectiveness, have waned. The vaccine not only protects the child from these serious viral infections but also contributes to herd immunity, which can help protect those who cannot be vaccinated.

While administering the vaccine before 12 months may not provide the optimal immune response due to maternal antibodies, waiting until 2 years could delay important protection and is not in line with established immunization schedules. That is why the timing of 12-15 months is recommended and is critical for early childhood vaccination practices.