Microbiology Infectivity period of measles is: A 2 days before and 4 days after appearance of rash B 4 days before and 5 days after appearance of rash C 4 days before and 1 days after appearance of rash D Entire incubation period 💡 Explanation Infectivity period of measles is: ✓ Correct Answer: B. 4 days before and 5 days after appearance of rash