This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of Immunization and Vaccination, Subject name: Social & Preventive Medicine
Post exposure prophylaxis schedule of rabies vaccine in a previously immunized person 
Select and explain. 
A. Day 0,3, 7, 14,21,90, B. Day 0,3, 7, 14,28,90, C. Day 0, 3, 7, D. day 0, 7, 28
C: Day 0, 3, 7
Answer: C: Day 0, 3, 7 
Explanation: Ans. (c) Day 0, 3, 7Ref: K. Park 23rd ed. / 279-80Schedule of Prophylaxis Rabies vaccineTypes of prophylaxisSchedulePre-exposureDay 0, 7, 28Post- exposureDay 0, 3, 7,14, 28, 90Post- exposure in vaccinatedDay 0, 3, 7