Which of the following vaccines can be administered to a patient with known anaphylactic reactions to eggs?
💡 Explanation
**Core Concept**
The question is testing the ability to identify vaccines that can be administered to patients with known egg allergies, a common concern in vaccination. The correct answer requires knowledge of egg-free or egg-substituted vaccines.
**Why the Correct Answer is Right**
The correct answer is **C. Influenza vaccine (inactivated)**, which is often produced in cell culture rather than chicken eggs. This method eliminates the risk of egg allergy reactions. The inactivated influenza vaccine is a common example of an egg-free vaccine, making it suitable for individuals with egg allergies.
**Why Each Wrong Option is Incorrect**
**Option A:** **Measles, Mumps, and Rubella (MMR) vaccine** is produced using chicken eggs and therefore is not suitable for individuals with egg allergies.
**Option B:** **Rabies vaccine (inactivated)** can be produced in either chicken eggs or cell culture, and the production method may not be clearly stated. Therefore, it's not a reliable choice for individuals with egg allergies.
**Option D:** **Varicella (chickenpox) vaccine** is produced using chicken eggs and is not suitable for individuals with egg allergies.
**Clinical Pearl / High-Yield Fact**
When administering vaccines to patients with egg allergies, it's essential to know the production method and ensure the vaccine is egg-free or egg-substituted to minimize the risk of anaphylactic reactions.