“…Neonatal infections may still occur in about 50% of the infants receiving ZIG prophylaxis and some of these infections may still be severe or fatal [3,10,11,13,15]. Therefore, some investigators [8,9,19], based on clinical experience, suggest that a combination of VZIG (or ZIG) and acyclovir (ACV) may be helpful for babies at risk of neonatal varicella. However, cases of neonatal varicella still occur.…”