The pneumococcal vaccine is generally safe and effective at preventing pneumococcal disease. Most people who get the vaccine do not have any serious problems with it, and the side effects are usually mild and go away on their own within a few days. However, as with any medicine, including vaccines, there is a chance of side effects. The most common side effects of the pneumococcal vaccine include:
- Feeling drowsy
- Loss of appetite
- Sore or swollen arm from the shot
- Fever
- Headache
These side effects are usually mild and last for 1 or 2 days. In rare cases, severe allergic reactions may occur after vaccination. Other possible side effects, although less common, include muscle aches, cough, difficulty breathing, fever over 102.2 °F (39 °C), and swollen lymph glands. If any of these side effects occur, medical attention may be necessary. It is important to note that people who have a more serious illness should probably wait until they recover before getting vaccinated.
