| CAAE | Certificate of Presentation of Ethical Appreciation |
| COVID-19 | CoronaVirus-associated Disease 2019 |
| IQR | Interquartile Range |
| ME/CFS | Myalgic Encephalomyelitis or Chronic Fatigue Syndrome |
| RT-PCR | Real-time polymerase chain reaction |
| SARS-CoV-2 | Respiratory Syndrome Coronavirus type-2 |
| SpO2 | Oxygen Saturation |
| SPSS | Statistical Package for the Social Sciences |
| USP | University of Sao Paulo |
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