| Glucocorticoid use in patients with another cause of immunocompromise |
| Other immunosuppressive drugs such as: |
| Antirejection medications |
| Purine analogs (eg, fludarabine) |
| Tumor necrosis factor-alpha inhibitors (eg, infliximab) |
| Temozolomide (especially when used in combination with radiation) |
| Alemtuzumab |
| Ibrutinib |
| Idelalisib |
| Defects in cell-mediated immunity |
| Cancer (particularly hematologic malignancy) |
| Hematopoietic cell transplantation (HCT; especially allogeneic HCT) |
| Solid organ transplantation |
| Treatment for rejection |
| Treatment for inflammatory conditions (eg, granulomatosis with polyangiitis [Wegener's]) |
| Severe malnutrition (especially protein malnutrition) |
| Primary immunodeficiencies (particularly severe combined immunodeficiency) |
| Prematurity |
