In December 2019, an outbreak of pneumonia with previously unknown course and etiology was reported in Whuan Province. Since then, COVID-19 as a pandemic disease has significantly changed our daily lives. Professionals have faced new challenges in diagnosis, treatment, rehabilitation of the patients, complications, and prevention. The purpose of this PhD is to obtain information about the nature of the disease, treatment options, the outcome of the disease, and the disease itself in general, in relation to the patients treated at our clinic.