Objectives: The aims of this study were to determine whether there are differences in the frequency of adverse events (AEs) from COVID-19 vaccines compared to widely issued vaccines and from COVID-19 drugs in contrast to a widely prescribed drug reported to the FDA Adverse Event Reporting System (FAERS) or EudraVigilance (EV) during the COVID- 19 pandemic. Materials and methods: The FAERS and EV adverse event databases were searched for adverse event reports filed in the U.S. and EU from November 2019 to March 2022. We included all COVID-19 vaccines and drugs which have been approved or emergency use authorized by both the FDA and EMA as of March 31, 2022. The numbers of AEs (serious or non-serious) and the numbers of reaction grou...