Infectivity of chicken pox last for -: (A) Till the last scab falls of, (B) 6 days after onset of rash, (C) 3 days after onset of rash, (D) Till the fever subsides
Answer is B. The incubation period of chickenpox is about 2 weeks. The patient is considered to be infectious during 2 days before and five days after the onset of lesions. REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:471