COVID-19(31) Treatment(27) USA(24) SARS-CoV-2(20) approval(20) coronavirus disease(19) Coronavirus disease 2019(17) coronavirus(16) acute respiratory syndrome(16) acute respiratory syndrome coronavirus 2(14) acute respiratory syndrome coronavirus(14) Infection(13) oxygen(12) severe acute respiratory syndrome Coronavirus(12) Emergency use authorization(11) immune response(10) Prophylaxis(9) Combination(9) respiratory(9) Canada(9) severe COVID-19(8) authorization(8) Emergency(8) individual(8) Trial(7) Ritonavir(7) Efficacy(7) SARS-COV-2 infection(7) the SARS-CoV-2(7) inhibitor(7)