
Ever since the sole U.S. manufacturer of varicella zoster immune globulin (VZIG) discontinued its production in October 2004, supply has dwindled to the point of depletion. This February, however, an investigational VZIG product, called VariZIG, has become available under an investigational New Drug Application (IND) for patients who have been exposed to varicella and are at increased risk for severe disease and complications.