I've heard turkey tail has been linked to treating cancer, and garden giant treats e coli. What can be used to treat Legionnaires Pneumonia?
EDIT: However the answer is accepted it is not correct. OP asked about pneumonia. And of cause mild analgetics is inadequate treatment. The answer below is pointing out about Pontiac deases which is mild version Legionellosis.
Turkey tail, oyster mushroom or other edible mushrooms having high analgesic effect can be used as a part of symptomatic treatment of lighter version of Legionnaire's decease, vis. Potiac fever. For the details please see Wang H, Liu Y, Han C. The analgesic effect of several edible mushrooms. OA Alternative Medicine 2013 Oct 01;1(3):22. However it is not recommended for treatement of severe cases of Pottiac fever or Legionnaire's decease itself, because high mortality rate untreated\unadquate treament (> 15%).