A nurse is preparing to administer scheduled immunizations to a 5-year-old child. Which of the following vaccines should the nurse plan to administer?

Choice A rationale The Haemophilus influenzae type b vaccine series is typically completed by age 12 to 15 months. It consists of a primary series starting at 2 months of age. According to standard immunization schedules, a healthy 5 year old child would have already received the full series of 3 or 4 doses during infancy. This vaccine prevents serious infections like bacterial meningitis and epiglottitis. It is not a routine requirement for the school entry age group of 4 to 6. Choice B rationale The Hepatitis B vaccine series is usually initiated at birth and completed by 6 to 18 months of age. It involves a three dose sequence to ensure long term immunity against liver infection. A 5 year old child who followed the standard pediatric schedule would have already achieved full immunization status for Hepatitis B years prior. Unless the child is on a catch up schedule, this vaccine is not part of the routine immunizations administered during the kindergarten physical. Choice C rationale The varicella vaccine protects against chickenpox and is administered in a two dose series. The first dose is typically given at 12 to 15 months, and the second booster dose is routinely scheduled for children between 4 and 6 years of age. Therefore, a 5 year old child is in the precise age range to receive their final dose before starting school. This ensures high levels of herd immunity and prevents outbreaks of this highly contagious viral infection. Choice D rationale The meningococcal conjugate vaccine is generally recommended for adolescents starting at age 11 or 12, with a booster dose given at age 16. It is not routinely administered to a healthy 5 year old child unless they have specific high risk medical conditions such as asplenia or persistent complement component deficiencies. For the general pediatric population, this immunization is reserved for the preteen and teenage years to protect against bacterial meningitis during peak periods of risk.