Side effects after a COVID-19 vaccination are typically mild and subside in one to two days — like soreness in the arm, fatigue, headaches, or a slight fever. Side effects can vary from person to person. For a list of common symptoms, helpful tips to relief side effects, and additional safety information. Even if you don’t experience any side effects, your body is building protection against the virus that causes COVID-19.
Adverse reactions to COVID-19 vaccines are rare. Based on more than two years of experience with the vaccines, including ongoing monitoring of side effects, the risk of having an adverse reaction to the vaccine is extremely low – much lower than the risk of serious illness if infected by the virus.