title: Atypical pneumonia.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007877:Legionnaires' Disease / Q000175:diagnosis / Q000503:physiopathology; D011019:Pneumonia, Mycoplasma / Q000175:diagnosis / Q000503:physiopathology*; D011024:Pneumonia, Viral / Q000175:diagnosis / Q000503:physiopathology*; D009626:Terminology as Topic