Which immunization is typically administered at 12 months of age?

The measles, mumps, and rubella (MMR) vaccine is typically administered at 12 months of age as part of the routine childhood immunization schedule. This vaccine is crucial because it protects against three serious viral infections: measles, which can lead to severe health complications; mumps, which can result in swelling and fever; and rubella, a disease that poses significant risks during pregnancy, potentially causing congenital rubella syndrome in infants.

Administering the MMR vaccine at this age is strategic because by 12 months, a child's immune system has matured sufficiently to respond to the vaccine effectively. Additionally, the vaccine generally requires two doses, with the first given around one year and a second dose between ages 4 and 6. The timing ensures that children are protected before exposure to these viruses, which are more common in young children.

The other immunizations mentioned, such as the hepatitis B vaccine, chickenpox vaccine, and pneumococcal vaccine, have different recommended ages for administration. The hepatitis B vaccine is given in multiple doses, with the first dose typically administered at birth. The chickenpox vaccine is generally recommended at 12 to 15 months, but it can be given as early as 12 months. The