<prompt> Communicable period of measles-After 4 days of rash4 days before and 5 days after rashThroughout diseaseOnly in incubation period  <response>: Ans. is b i.e., 4 days before and 5 days after rash The period of communicability for measles is 4 days before and 5 days after the appearance of rash.Period of communicability in important respiratory infections Chicken pox: 1-2 days before to 4 - 5 days after appearance of rash. Measles: 4 days before to 5 days after appearance of rash Rubella: 7 days before symptoms to 7 days after appearance of rash. Mumps: 4-6 days before symptoms to 7 days thereafter. Influenza: 1-2 days before to 1 - 2 days after onset of symptoms. Diphtheria: 14 - 28 days from disease onset. Pertussis: 7 days after exposure to 3 weeks after paroxysmal stage. 