system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 4-year-old girl is brought to her pediatrician for a routine check-up. She was diagnosed with sickle cell disease last year after an episode of dactylitis. She was started on hydroxyurea, with no painful crises or acute chest episodes since starting the medication. Which of the following is an appropriate preventive measure for this patient?
assistant
Pneumococcal vaccine