Which vaccine considerations are important for pediatric patients undergoing chemotherapy?

• A. Live vaccines are avoided during chemotherapy; inactivated vaccines may be given when immune function has recovered; coordinate with oncology team.
• B. Live vaccines are given during chemotherapy without regard to immune status.
• C. Vaccination status is not affected by chemotherapy.
• D. Only pneumococcal vaccine is needed.

Answer: (A)

During chemotherapy, the immune system is suppressed, so live vaccines pose a risk of causing disease and should be avoided while treatment is ongoing. Inactivated vaccines do not contain live organisms and are generally safe, but the immune response may be weaker; therefore they are given only after immune function has recovered or when off therapy, with careful coordination with the oncology team to align vaccination with treatment cycles and counts. This approach protects the child from preventable infections while minimizing risk. The other ideas fall short because live vaccines during chemotherapy without regard to immune status can be dangerous, chemotherapy does affect vaccination safety and timing, and focusing on only one vaccine ignores the broader immunization needs of children undergoing cancer treatment.