A key component of rabies post-exposure prophylaxis is:

• A. Observation only
• B. HRIG infiltrated around wound
• C. Vaccination alone
• D. Oral antibiotics for a week

Answer: (B)

Rabies post-exposure prophylaxis relies on providing immediate protection while the body builds its own long‑term defense. The best component here is infiltrating human rabies immune globulin around the wound. HRIG supplies immediate passive antibodies that neutralize any virus at the entry site, which is crucial because the virus can begin traveling toward the nervous system soon after exposure. Any remaining HRIG should be given intramuscularly at a site distant from the wound to provide systemic coverage. Vaccination is then started to stimulate active immunity for lasting protection, with a schedule that ensures robust antibody formation over the coming weeks. Observation alone offers no protective antibodies, vaccination alone lacks immediate passive protection, and antibiotics have no role against a viral infection like rabies.