Sample: How many MMR doses should a man born in 1960 who was vaccinated at age 3 receive if he is travelling to Brazil in 4 months?
According to the Centers for Disease Control (CDC), between January 1 and August 1, 2019, there were nearly 1100 cases of measles in 30 states. This is the greatest number of cases reported in the US since 1992, with the majority of cases being among people who were not vaccinated.