The Vaccine Adverse Event Reporting System (VAERS) is a cooperative
program for vaccine safety of the Centers for Disease Control and Prevention
(CDC) and the U.S. Food and Drug Administration (FDA). VAERS allows coordinated
and centralized monitoring of possible adverse events (possible side effects)
that occur after the administration of U.S.-licensed vaccines.
Health professionals are required to report all reactions that
occur after a vaccination, regardless of whether symptoms seem more likely to
be related to another condition or illness. Anyone can submit a report.
Just because a reaction was reported to VAERS does not mean the
vaccine caused the reaction. Careful studies are conducted if a pattern emerges
that suggests potential problems with a vaccine.