Reports are that immunosuppressed patients have a higher risk for infection, but the frequency of colds and flu should not be much elevated. Patients should tell the doctor about chicken pox or tuberculosis (active or not as it could reactivate), and any herpes infection.
Prednisone may distort lab tests. Allergy tests and tuberculosis tests will be invalid. Pap smears may be misinterpreted as cervical dysplasia. Test results for tuberculosis and cancer may also be affected. Other medications may also interfere with medical test results. If you have questions consult your doctor or pharmacist.