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