A Child Is Seen in a Health Care Clinic, and a Diagnosis

A child is seen in a health care clinic, and a diagnosis of chickenpox is confirmed. The mother expresses concern for two other children at home. She asks the nurse if the child is infectious to the other children. The most appropriate response by the nurse is:

A) "The infectious period occurs after the lesions begin."
B) "The infectious period begins when the lesions begin to crust."
C) "The infectious period is not known, and it is possible that the children may develop the chickenpox."
D) "The infectious period begins 1 to 2 days before the onset of the rash to about 5 days after the onset of the lesions and crusting of the lesions."