Social & Preventive Medicine What is the period of infectivity in measles ? A From 7 days before to 7 days after the rash B From 3 days before to 5 days after the rash C From 9 days before to 12 days after the rash D From 5 days before to 9 days after the rash 💡 Explanation What is the period of infectivity in measles ? ✓ Correct Answer: B. From 3 days before to 5 days after the rash