| ACE2 | angiotensin-converting enzyme 2 |
| ARDS | acute respiratory distress syndrome |
| CI | confidence intervals |
| COVID-19 | Coronavirus Disease |
| CRP | C-reactive protein |
| G-CSF | granulocyte colony-stimulating factor |
| IL-2 | interkeukine-2 |
| IL-6 | interleukin-6 |
| IL-7 | interleukin-7 |
| IL-10 | interleukin-10 |
| IP-10 | interferon gamma-induced protein 10 kDa |
| IQR | interquartile range |
| LDH | lactate dehydrogenase |
| MCP-1 | monocyte chemoattractant protein-1 |
| MIP-1α | macrophage inflammatory protein-1 alpha |
| MODS | multiple organ dysfunction syndrome |
| NK | natural killer |
| OR | odds ratio |
| PCT | procalcitonin |
| RT-PCR | real-time reverse-transcriptase polymerase-chain reaction |
| SARS-CoV-2 | severe acute respiratory syndrome coronavirus 2 |
| STAT3 | signal transducer and activator of transcription 3 |
| TNF-α | tumor necrosis factor-alpha |