VAERS collects reports of possible adverse events that happen after vaccination. Anyone can submit a report to VAERSexternal icon, including patients, parents or caregivers, healthcare providers, and vaccine manufacturers.
Under Emergency Use Authorization, FDA requires healthcare professionals to report to VAERS certain adverse eventsexternal icon that occur after COVID-19 vaccination. CDC also encourages reporting of any medically important adverse event even if it isn’t clear if the vaccine caused the health problem. This helps public health officials monitor and follow-up on possible safety problems. Learn more about selected adverse events reported to VAERS.
Vaccine safety experts review all reports of serious adverse events submitted to VAERS. A serious adverse event after vaccination is something that causes
When VAERS staff members follow-up on a report of a serious adverse event, they ask for the patient’s medical records related to the event to learn more about what happened.
VAERS reports are available to the public, but to protect privacy and confidentiality they do not include information that could identify the person.
VAERS reports alone generally cannot be used to determine if a vaccine caused or contributed to an adverse event or illness. Some reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. VAERS reports often lack contextual information, such as total vaccinations given or information on unvaccinated groups for comparison. Most reports to VAERS are voluntary, which means they may be subject to biases. Data from VAERS reports should always be interpreted with these limitations in mind.
Learn more about how VAERS helps to monitor vaccine safety.
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