COVID-19(20) Patient(20) determine(15) performed(14) SARS-COV-2 infection(13) death(13) disease(13) analyzed(11) change(11) died(11) Lungs(11) SARS-CoV-2(11) histological(11) Comorbidities(11) collected(11) Bacterial(11) RT-PCR(10) dissemination(10) vaccination(10) Occurrence(10) virus(10) individual(10) Infection(9) Diffuse alveolar damage(9) pathology(9) biopsy(9) organ(8) Immunoglobulin(8) Viral variants(8) accompanied(8)