| COVID-19 | coronavirus disease 2019 |
| SARS-CoV-2 | severe acute respiratory syndrome coronavirus 2 |
| MERS-CoV | Middle East respiratory syndrome coronavirus |
| LPV/RTV | lopinavir/ritonavir |
| PRISMA | Preferred Reporting Items for Systematic reviews and Meta-Analysis |
| RoB 2 | Version 2 of the Cochrane risk-of-bias tool for randomized trials |
| ROBINS-I | Risk of bias in non-randomized studies—of interventions |
| RT-PCR | real-time reverse transcription-polymerase chain reaction |
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