What is Adverse Events Following Immunisation (AEFI)?
Historical Background
Key Points
12 points- 1.
An Adverse Event Following Immunisation (AEFI) is defined as any untoward medical occurrence that happens after vaccination, but it does not automatically mean the vaccine caused it. For example, if someone gets a fever a day after a vaccine, it's an AEFI, but it could be due to a common cold, not the vaccine itself.
- 2.
The primary purpose of the AEFI system is surveillance and monitoring of vaccine safety. It acts like an early warning system, collecting data on all health events post-vaccination to identify any patterns or unexpected reactions that might be linked to the vaccine.
- 3.
AEFI mechanisms cover all vaccines administered in a country, not just specific ones like Covid-19 vaccines. This ensures a comprehensive safety net for the entire national immunisation program.
- 4.
Visual Insights
AEFI Monitoring & Proposed No-Fault Compensation Process
This flowchart illustrates the steps involved in monitoring Adverse Events Following Immunisation (AEFI) and the proposed 'no-fault' compensation mechanism for serious vaccine-related injuries, as directed by the Supreme Court.
- 1.Suspected Adverse Event Following Immunisation (AEFI) Occurs
- 2.Reporting by Individuals/Private Doctors on Accessible Virtual Platform (SC Mandate)
- 3.Data Collection & Surveillance by National AEFI System
- 4.Scientific Assessment & Investigation by AEFI Committees
- 5.AEFI Data Regularly Placed in Public Domain (SC Mandate)
- 6.Is the AEFI Serious (e.g., death, permanent disability)?
- 7.No-Fault Compensation Claim Filed by Affected Family/Individual
- 8.Compensation Disbursed as per Policy (SC Mandate)
- 9.
Recent Real-World Examples
1 examplesIllustrated in 1 real-world examples from Mar 2026 to Mar 2026
Source Topic
SC Mandates 'No-Fault' Compensation for Covid Vaccine Side Effects
Polity & GovernanceUPSC Relevance
Frequently Asked Questions
61. In an MCQ, why is it crucial to understand that an 'Adverse Event Following Immunisation (AEFI)' does not automatically imply a causal link with the vaccine?
This is a common trap. The definition of AEFI is 'any untoward medical occurrence that follows immunisation and does not necessarily have a causal relationship with the vaccine itself'. It's a surveillance term. For example, if someone gets a fever a day after a vaccine, it's an AEFI, but it could be due to a common cold, not the vaccine. The system collects all such events to *monitor* safety and *then* investigate for causality, not to assume it from the start.
Exam Tip
Remember: AEFI is about 'temporal association' (happening after), not 'causal association' (caused by). This distinction is frequently tested.
2. Before the Supreme Court's 2022 and 2026 directives, what were the main challenges in AEFI reporting and transparency in India, and how have these rulings aimed to address them?
Historically, AEFI reporting largely relied on healthcare providers, and public access to detailed data was limited, leading to trust deficits and underreporting. The Supreme Court's directives in Jacob Puliyel vs Union of India (2022) and subsequent orders in 2026 aimed to address these gaps by:
