You are the medical officer in charge of the immunisation programme at a sub-centre and you are informed by the local ASHA worker that one of the children who was immunised has has been dizzy. On fuher investigation it was confirmed that the symptoms were due to anxiety of pain of the injection and not as a result of the vaccine. You would consider the incidence as:

**Core Concept**
An adverse event following immunization (AEFI) is any untoward or unfavorable symptom, sign, or disease that occurs following administration of a vaccine, whether or not it is suspected to be related to the vaccine. AEFI can be classified into two main categories: vaccine-related and non-vaccine related.

**Why the Correct Answer is Right**
In this scenario, the symptoms of dizziness are not a result of the vaccine itself but rather due to anxiety or pain of the injection. This indicates that the adverse event is not vaccine-related. To determine the type of AEFI, we need to consider the relationship between the vaccine and the adverse event. If the adverse event is caused by the vaccine, it is vaccine-related, but if it is caused by factors unrelated to the vaccine, such as anxiety or pain of the injection, it is non-vaccine related.

**Why Each Wrong Option is Incorrect**
**Option A:** Vaccine-related AEFI would imply that the symptoms of dizziness were caused by the vaccine itself, which is not the case here.
**Option C:** Non-specific AEFI is an outdated term and not commonly used in modern immunization practices. It does not accurately describe the situation.

**Clinical Pearl / High-Yield Fact**
It's essential to investigate and differentiate between vaccine-related and non-vaccine related AEFI to ensure accurate reporting and to provide appropriate care to the affected individual.

**Correct Answer: D. Non-vaccine related AEFI. Non-vaccine related AEFI.**

✓ Correct Answer: B. Injection reaction