An error appeared in the article by Goodman et al, titled “The Safety of Trivalent Influenza Vaccination in Healthy Children Aged 6 to 24 Months” published in the May 2006 issue of Pediatrics Electronic Pages (doi:10.1542/peds.2005-2234). The authors state that when they defined the outcomes they used two processes, an internal review of observed codes and replication of past work. The authors inadvertently used newer codes for ongoing Vaccine Safety Datalink (VSD) studies, instead of the codes used in the original paper by Frace et al. The newer codes will be part of a publication that will be authored by Dr Simon Hambidge and colleagues. The authors apologize for any inconvenience this may have caused the readers or Dr Hambidge and his colleagues in the VSD studies.