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Section 1. Active and Passive Immunization
Active Immunization
Vaccine Safety and Contraindications
Risks and Adverse Events|
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RISKS AND ADVERSE EVENTS
All licensed vaccines in the United States are safe and effective, but no vaccine is completely safe and effective in every person. Some vaccine recipients will have an adverse event, and some will not be protected fully. The goal of vaccine development is to achieve the highest degree of protection with the lowest rate of adverse events. Adverse events following immunization include both true vaccine events and coincidental events that would have occurred without vaccination. As immunizations successfully eliminate their target vaccine-preventable diseases, vaccine safety issues have received more attention, increasing the need for immunization providers to communicate risks and benefits of immunizations to a population whose first-hand experience with vaccine-preventable diseases increasingly is rare. Many families lack awareness of the continued threat of vaccine-preventable diseases (eg, pertussis, measles, mumps, invasive H influenzae) among unimmunized people.
Risks of immunization may vary from minor and inconvenient to severe and life threatening. Rarely, serious adverse events following immunization occur, resulting in permanent sequelae or life-threatening illness.
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