Social & Preventive Medicine What is the period of infectivity in measles? A From 7 days to 7 days after the rash B From 4 days to 4 days after the rash C From 9 days to 12 days after the rash D From 5 days to 9 days after the rash 💡 Explanation What is the period of infectivity in measles? ✓ Correct Answer: B. From 4 days to 4 days after the rash