Surveillance systems are crucial for several reasons:
1. Safety Monitoring: They help detect any adverse events following immunization (AEFIs) to ensure vaccines are safe for public use. 2. Effectiveness Evaluation: These systems assess how well vaccines perform in real-world settings, beyond controlled clinical trials. 3. Immunization Coverage: They track vaccination rates to ensure target populations are adequately immunized. 4. Outbreak Detection: Surveillance can identify outbreaks of vaccine-preventable diseases, prompting rapid response measures.
