Post exposure, Measles vaccine must be given within: (A) 3-4 days, (B) 10-Jul, (C) 10-14 days, (D) 1-6 months
Answer is A. - IP of measles - 10 days - IP of vaccine induced measles - 7 days - For providing protection vaccine requires only 6-7 days. - So, vaccine should be used within 3-4 days of exposure.