This is from the link above Safe Uses of Cortisol it's at the very end of the link.
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VIRAL INFECTIONS
36) Patients with acute influenza were treated in the same manner in which patients with chronic adrenal insufficiency were treated when they developed acute infections. Cortisol, 20 mg. by mouth four times daily before meals and at bedtime, was started. Patients were instructed to continue this dosage until they felt well, then decrease to 10 mg. four times daily for two days, then 5 mgs.four times daily for two days, then stopped. Clinical responses were striking. Within 24 hours, all patients felt much better, and within 48 hours symptoms such as fever, malaise, and generalized aching had completely subsided, and they felt quite well. The initial dosage of cortisol was decreased after 48 hours and discontinued after six days of therapy. No relapse or complications occurred. 136
37) For many years, it has been recognized that the clinical symptoms of acute malaise, anorexia, fever, weakness, exhaustion, and generalized aching that occur with any acute severe infection, but especially with influenza, are similar to the symptoms of acute adrenal insufficiency. 138 The possibility that a relative deficiency of adrenal response might be present in the incipient phase of any infectious disease should therefore be further investigated. 139
38) We now know that influenza viruses attack the human body by decreasing the production of adrenocorticotropic hormones (ACTH), thereby decreasing the production of cortisol, the only hormone that is absolutely essential for life, so treatment with physiologic dosages of cortisol is a safe and beneficial therapy for patients with influenza, regardless of its type. 143