adverse events following immunization (AEFI)

Adverse events following immunization (AEFI) are any health problems that occur after receiving a vaccine. They can range from mild, like a sore arm or mild fever, to more serious, but serious side effects are very rare. Most AEFIs are temporary and indicate that the immune system is responding to the vaccine. Healthcare professionals monitor and investigate these events to ensure vaccines are safe. It’s important to remember that the benefits of vaccination in preventing serious diseases outweigh the small chance of adverse reactions. If you experience any unusual symptoms after vaccination, consult a healthcare provider.