No information is available on the clinical use of varicella zoster immune globulin during breastfeeding. Varicella zoster immune globulin is an immune globulin (IgG) rich in IgG antibodies against varicella zoster virus. IgG is a normal component of breastmilk that is likely to be partially destroyed in the infant's gastrointestinal tract and poorly absorbed by the infant during breastfeeding. Varicella zoster virus immune globulin can be given intramuscularly to infants weighing less than 2 kg. No special precautions are required during breastfeeding.