SARS-CoV-2(75) COVID-19(69) coronavirus(44) Infection(33) pandemic(28) acute respiratory syndrome(27) Patient(24) SARS-COV-2 infection(23) caused(23) virus(23) COVID-19 pandemic(19) Spread(19) Pathogenesis(17) variant(17) Evolution(17) patients(16) outbreak(15) disease(15) public health(15) significantly(15) coronavirus disease(15) Treatment(14) Protein(14) Seroprevalence(14) develop(13) lymphocyte(13) sensitivity(13) COVID-19 patient(12) Mortality(12) reported(12)