Abstract
OBJECTIVE: The American Academy of Pediatrics (AAP), Advisory Committee on Immunization Practices (ACIP), and Centers for Disease Control and Prevention (CDC) recommend delaying live vaccinations up to 11 months after transfusions of certain blood products due to the risk of immunoglobulins decreasing immunization efficacy. Because vaccination schedules recommend live immunizations at 12 months, infants aged 5 to 12 months who undergo cardiac surgery requiring blood products are potentially at risk for improper vaccination. The objective of this study was to identify the risk of inappropriately timed live vaccination in pediatric patients after cardiovascular surgery. METHODS: This single-center, retrospective chart review included 345 patients 5 to 12 months of age who underwent cardiovascular surgery between January 1, 2010, and December 31, 2016. Included patients received packed red blood cells (PRBCs) and/or platelets during the surgical admission and a live vaccine within the first 18 months of life. The primary endpoint was the incidence of live vaccine administration within 7 months of receiving PRBCs and/or platelets. RESULTS: Of the 345 included patients, 67% (n = 230) were inappropriately vaccinated after receiving platelets and/or PRBCs during cardiac surgery. CONCLUSIONS: Infants who undergo cardiac surgery between the ages of 5 and 12 months are at risk for inappropriate live vaccination timing. A clinically significant percentage of pediatric patients who received blood products during a cardiac surgical admission later received live vaccines at times that were inconsistent with AAP, ACIP, and CDC recommendations. Future interventions aimed at educating providers and patients may be warranted.