The Post-licensure Rapid Immunization Safety Monitoring System is the FDA’s nationwide system for monitoring vaccine safety. First, these are self-reported data and we did not independently confirm precise scientific practice. Second, there may be the possibility that response bias played a role in these results as these with a selected perspective of these issues could have been roughly doubtless to reply to the survey. More than 80% of physicians in each specialties reported systems to document immunization provision . However, variations between the 2 specialties in manner of documentation exist. Pediatricians have been more probably than household physicians to record immunizations on a special web page in the patient’s medical report and to report immunizations in some type of computer-based system.