Yellow Card scheme for adverse events does not suggest any new side effects of COVID-19 vaccines
Adverse event reporting systems, such as the Yellow Card scheme in the U.K. or VAERS in the U.S., are designed to help health authorities monitor the safety of medical products such as the COVID-19 vaccines. However, the databases contain unverified information and cannot demonstrate that COVID-19 vaccines caused adverse events. The reports can be a starting point for a detailed investigation into potential side effects, which happened for rare cases of blood clotting and anaphylaxis. Overall, the U.K. regulatory body, the MHRA, still concludes that the benefits of the COVID-19 vaccines outweigh their known risks.