Social & Preventive Medicine After the appearance of rash, prophylactic isolation of measles case is necessary for a minimum of:September 2007 A 2 days B 5 days C 7 days D 9 days 💡 Explanation After the appearance of rash, prophylactic isolation of measles case is necessary for a minimum of:September 2007 ✓ Correct Answer: B. 5 days