The infectivity of chickenpox lasts for: (A) Till the last scab falls off, (B) 6 days after onset of rash, (C) 3 days after onset of rash, (D) Till the fever subsides
Answer is B. Period of communicability:
– Chickenpox: 1 – 2 days before to 4 – 5 days after appearance of rash
– Measles: 4 days before to 5 days after appearance of rash
– Diphtheria: 14 – 28 days from disease onset
– Poliomyelitis: 7 – 10 days before and after onset of symptoms