Which vaccine should be administered to a child at the age of 12 years who has never received it?

For a child who has never received the varicella vaccine, it is crucial to immunize them at the age of 12 years. The varicella vaccine protects against chickenpox, which can lead to severe complications, including pneumonia and encephalitis. The immunization schedule recommends that the first dose of the varicella vaccine be given between 12 to 15 months of age, with a second dose at 4 to 6 years. However, if a child has not received the vaccine by 12 years old, it is vital to administer the vaccine as soon as possible to ensure protection.

Although the other vaccines listed—Hepatitis B, MMR (Measles, Mumps, Rubella), and Tdap (Tetanus, Diphtheria, Pertussis)—are also important and part of the routine immunization schedule, they are not specifically indicated for administration at this particular age if the child has never received them. The focus on administering the varicella vaccine to a child who has missed previous doses highlights the importance of catching up on vaccinations to prevent outbreaks and protect public health.