We conducted a retrospective study of 67 patients with primary viral pneumonia (PVP) based on positive viral polymerase chain reaction (PCR) test results of bronchoalveolar lavage fluid.
Influenza virus was the most common (n=25), followed by common cold caused by coronavirus (n=23). The frequency of upper respiratory tract infection symptoms was found only in 25.4%. Some laboratory findings associated with COVID-19, such as lymphocytopenia and elevated D-dimer or ferritin levels, were also found, mainly in severe cases. Computed tomography showed bilateral consolidation (65.7%) and ground-glass opacities (89.6%). Patients received supportive care, antivirals, corticosteroids, or a combination thereof. In total, 13.4% of patients required mechanical ventilation, and the mortality rate for PVP was 6.0%. Prospective studies are needed to establish treatment strategies.