Characteristics of patients with a severe course of COVID-19
| Characteristics | Patient 1 | Patient 2 | Patient 3 | Patient 4 |
| Age range | 40–50 | 50–60 | 50–60 | 70–80 |
| Sex | Male | Female | Female | Female |
| Underlying disease | RA + Sjogren’s syndrome | Systemic lupus erythematosus + Sjogren’s syndrome | RA | RA |
| Treatment | RTX | RTX | RTX | RTX |
| Time interval between last RTX dose and occurrence of COVID-19 (months) | 7 | 5 | 2 | 7 |
| Risk factors for severe evolution of COVID-19 | ||||
| Tobacco | Former | Former | Active | No |
| Other comorbidities | None | None | Pulmonary rheumatoid nodule with lobectomy | None |
| Intensive care | Yes | Yes | Yes | Yes |
| Death | No | No | Yes | No |
RA, rheumatoid arthritis; RTX, rituximab.