This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital Infections, Subject name: Pediatrics
A mother has been diagnosed with chicken pox. She delivered 7 days ago a term infant that appears to be healthy. The baby is afebrile. Which of the following is the most appropriate step in management? 
Select and explain. 
A. Advise the mother to continue regular baby care, B. Hospitalize the infant in the isolation ward, C. Administer acyclovir to the infant, D. Administer varicella-zoster immunoglobulin(VZIG) to the infant
A: Advise the mother to continue regular baby care
Answer: A: Advise the mother to continue regular baby care 
Explanation: If a normal full-term newborn is exposed to chickenpox 2 or more days after delivery, VZIG and isolation are not necessary because these babies appear to be at no risk for complications. VZIG should be given to the infant immediately after delivery if the mother had the onset of varicella within 5 days prior to delivery, and immediately upon diagnosis if her chicken pox staed within 2 days after delivery. Acyclovir may be used in infants at risk for severe varicella, such as those infants exposed perinatally.