The usual incubation period for varicella is 14 to 16 days. An infected person is contagious one to two days before onset of rash until all skin lesions have crusted.
Transmission of varicella-zoster virus (VZV) occurs through direct contact with vesicular fluid, inhalation of aerosol generated by scratching of a vesicle or inhalation of an aerosol of infectious respiratory secretions. Virus enters the host through the upper airways or the conjunctiva. In certain settings, transplacental transmission of VZV may occur.
Which of the following is not a correct statement regarding varicella post-exposure prophylaxis for an exposed, susceptible child at risk of severe disease because of immunosuppression?
Answer: b is not correct. The Centers for Disease Control...