A 12-month-old child who received a Hep-B vaccine one week ago needs an MMR vaccine. When can the MMR vaccine be administered?

The MMR (measles, mumps, and rubella) vaccine can be administered to a child who is at least 12 months old. For a child who has received a Hepatitis B (Hep-B) vaccine, there is no minimum wait period specifically related to receiving the MMR after the Hep-B vaccine; both vaccines can be given on the same day if necessary or at separated intervals.

However, it is generally recommended to follow the guidelines set forth by the CDC, which suggest that there should be a spacing of at least 4 weeks between live vaccines. The MMR vaccine is live, whereas the Hep-B vaccine is an inactivated vaccine. Therefore, waiting 4 weeks after administration of the Hep-B vaccine is consistent with vaccination schedules to ensure the body has adequate immune response time.

After the Hep-B vaccine has been administered, the MMR can be given 4 weeks later, aligning with the recommended best practices for live vaccines. This ensures optimal immune response and adherence to the immunization schedule.