Varicella-zoster virus infections in pregnancy.

Varicella-zoster virus can cause a distinct congenital syndrome, a potentially fatal neonatal infection and life-threatening maternal illness. Physicians can reduce morbidity from these conditions by advising nonimmune pregnant women to avoid exposure to chickenpox and herpes zoster and, when indicated, by promptly administering varicella-zoster immune globulin. When prevention fails, acyclovir may be effective therapy.