What is the ideal time for staing post-exposure prophylaxis with acyclovir in a person exposed to varicella?: (A) Immediately after exposure, (B) 3rd day, (C) 7-9 th day, (D) 10-14 th day
Answer is C. Antiviral therapy for prophylaxis against varicella should be staed 7 days after the intense exposure, using acyclovir. Ref: Harrisons Principles of Internal Medicine, 18th edition, Page: 1466