VAERS accepts reports of adverse events and reactions that occur following vaccination. Healthcare providers, vaccine manufacturers, and the public can submit reports to the system. While very important in monitoring vaccine safety, VAERS reports alone cannot be used to determine if a vaccine caused or contributed to an adverse event or illness. The reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. In large part, reports to VAERS are voluntary, which means they are subject to biases. This creates specific limitations on how the data can be used scientifically. Data from VAERS reports should always be interpreted with these limitations in mind.
The strengths of VAERS are that it is national in scope and can quickly provide an early warning of a safety problem with a vaccine. As part of CDC and FDA’s multi-system approach to post-licensure vaccine safety monitoring, VAERS is designed to rapidly detect unusual or unexpected patterns of adverse events, also known as “safety signals.” If a safety signal is found in VAERS, further studies can be done in safety systems such as the CDC’s Vaccine Safety Datalink (VSD) or the Clinical Immunization Safety Assessment (CISA) project. These systems do not have the same scientific limitations as VAERS, and can better assess health risks and possible connections between adverse events and a vaccine.
Key considerations and limitations of VAERS data:
VAERS data available to the public include only the initial report data to VAERS. Updated data which contains data from medical records and corrections reported during follow up are used by the government for analysis. However, for numerous reasons including data consistency, these amended data are not available to the public.
Use the COVID Toggle on the search form to view just the COVID reports
Total number of reports: 1,371,471
within 15 minutes progressive light-headedness leading to near-syncope and diaphoresis. After 20 minutes symptoms subsided.Read FULL REPORT
Pt felt wave come over body @ 1218 starting in head and going down. Bad taste in mouth, tingling in body , legs, back , across stomach, BP 150/100 P [email protected] 1219, EMS activated. BP 120/80, P 80 Pt alertRead FULL REPORT
Within 1 minute, patient complained of symptoms of lightheadedness, flushing, asked for water. Symptoms persisted, reported vagal and "spacey", vitals were 117/91, HR 67, O2 sat 99% on room air. ReportedRead FULL REPORT
rPfizer-BionNTech COVID-19 Vaccine EUA 5-7 minutes after the vaccine Associate stated she did not feel right, mentioned chest pain. "My chest feels funny. It feels like when you have really bad heartburnRead FULL REPORT
Within a few minutes of receiving the COVID 19 vaccination, patient developed lightheadedness, shortness of breath, headache, and some nausea. She did get some redness to her neck and upper chest. NoRead FULL REPORT
About 25 minutes after receiving vaccine complained of dizziness and being hot and nauseated. No difficulty breathing. No chest pain. B/P was 130/90 and was monitored. It went down to 124/80 after he startedRead FULL REPORT