A Child Taking Oral Corticosteroids for Asthma Is Exposed to Varicella.The

A child taking oral corticosteroids for asthma is exposed to varicella.The child has not had the varicella vaccine and has never had the disease.What intervention should be taken to prevent varicella from developing?

A) No intervention is needed unless varicella develops.
B) Administer the varicella vaccine as soon as possible.
C) The child should begin a course of oral antibiotics.
D) The child should be prescribed acyclovir.