“…In patients with other immune deficiencies, length and severity of illness may depend on the ability to reverse the immunosuppression. Patients included here are those on immunosuppressive chemotherapy, especially for cancer and transplantation (61,162,183,214,216,221,238,268,306,345); malnourished individuals, particularly children (39,49,70,126,158,196,205,206,261,273,279,280,289,309,313,347,348); and persons with concurrent viral infections such as measles, chicken pox, or cytomegalovirus (38,89,125,145,261,301,309,344).…”