The measles vaccine is a safe and effective immunization that protects against measles, a highly contagious viral disease. It is usually given as part of the MMR vaccine, which also protects against mumps and rubella. The vaccine is typically administered in two doses, with the first dose given between 12 and 15 months of age and the second dose between 4 and 6 years. Receiving the measles vaccine not only helps protect the individual but also contributes to community immunity, reducing the spread of the virus. Vaccination has led to a significant decline in measles cases worldwide, making it an essential public health measure.