Not to be inj intravascularly or IM. Anaphylactic reactions. Defer vaccination in the presence of acute illness eg, fever >38°C. Avoid close association w/ high-risk individuals eg, immunocompromised, pregnant women & newborn infants w/o documented history or lab evidence of prior infection for up to 6 wk following vaccination. Not to be given concomitantly w/ Ig eg, varicella-zoster Ig. Avoid pregnancy for 3 mth after vaccination in women of childbearing potential. Not to be used during pregnancy. Lactation. Not recommended in infant <12 mth. Not to be used in elderly.