Probably None: Prednisone bursts generally clear the system in 1-2 weeks. Patients who take a prednisone burst are generally immune competent again and prepared for immunizations a couple of weeks after steroids. We aren't allowed to provide advice on this forum, but those are the pharmacokinetics of prednisone. If you would like further advice on the timing of your flu shot, please see your doctor.
Answered 11/2/2018
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