People can have different reactions to vaccines. This document from Mass General Brigham provides an overview of potential reactions.
V-safe is a smartphone-based tool from the CDC that uses text messaging and web surveys to check in on your health after you receive your COVID-19 vaccination.
The FDA issued EUA for the three vaccines from Pfizer, Moderna, and Johnson & Johnson. These fact sheets have information about the risks and benefits of the vaccines. Please read the EUA fact sheet that corresponds to the vaccine you received.