F2 and lymphopenia: The disease typically starts with mild symptoms resembling the common cold with clinical manifestations such as fever (in 98–88% of the cases), fatigue, dry cough, upper respiratory tract obstruction, dyspnea, sputum production, muscle pain, and gastrointestinal, blood lymphopenia, increased the prothrombin (PT) prolongation, elevated C reactive protein (CRP), and lactate dehydrogenase (LDH).