Some immunodeficiency disorders are mild and result in occasional illness. Others are severe and may be fatal. Immunosuppression that results from medications is often reversible once the medication is stopped.

• Disease development
• Frequent or persistent illness
• Opportunistic infections
• Increased risk for certain cancers/tumors

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Call your health care provider immediately if you are taking immunosuppressive drugs (for instance, chemotherapy or prednisone), and you develop a fever greater than 100.5 degrees F, or have cough with shortness of breath. If a stiff neck and headache accompany your fever, go directly to an emergency department.

Contact your health care provider if you have recurrent yeast infections or oral thrush.