What is the purpose of post-exposure prophylaxis (PEP) in occupational exposures?

• A. Cure infection or disease after exposure.
• B. Prevent infection or disease after potential exposure to a biological agent.
• C. Replace PPE after exposure.
• D. Neutralize chemicals after exposure.

Answer: (B)

Post-exposure prophylaxis is about preventing infection after there has been a potential exposure to a biological agent. When exposure occurs, the goal is to stop the pathogen from establishing itself in the body, so timely administration of the appropriate preventive treatment—such as antiviral or antimicrobial medicines, vaccines, or immune globulins—helps reduce the risk of developing illness. It’s important to distinguish this from treating an infection that’s already present (which would be a cure or treatment, not prophylaxis). It also isn’t about replacing PPE after exposure—PPE is used to prevent exposure in the first place, while PEP addresses the risk after exposure. And it doesn’t apply to neutralizing chemicals; that would be a chemical exposure response, not infectious disease prevention.