Personnel born after what year are required to receive two lifetime doses of the MMR vaccine?

The requirement for individuals born after a specific year to receive two lifetime doses of the MMR (measles, mumps, and rubella) vaccine is based on the epidemiology of these diseases and the implementation of vaccination programs.

Individuals born after 1957 are targeted because this is the year that the MMR vaccine was first introduced. Those born before this time would have been exposed to the actual diseases, thus offering them natural immunity. As such, a person born after 1957 would have likely missed the MMR vaccination during childhood unless they received it as an adult. Therefore, the recommendation is for them to receive two doses to ensure they are fully vaccinated against these viral infections.

The recommendation reflects public health policies aimed to eliminate outbreaks of these diseases, which are highly contagious. A person born before 1957 is generally considered to have a lower risk of being susceptible since most would have either had the diseases or been vaccinated before the introduction of the MMR vaccine.