Table 1. Characteristic features of participants (n=3532).
COVID-19, coronavirus disease 2019; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
| Characteristic | Number of participants, n (%) |
| Age (years) | |
| <30 | 1887 (53.4) |
| 30-39 | 1139 (32.3) |
| 40-49 | 358 (10.1) |
| ≥50 | 148 (4.2) |
| Gender | |
| Male | 2389 (67.6) |
| Female | 1143 (32.4) |
| Profession | |
| Staff involved in COVID-19 patient care | 2567 (72.7) |
| Administrative staff | 492 (13.9) |
| Students | 473 (13.4) |
| Ivermectin prophylaxis | |
| No ivermectin prophylaxis | 1147 (32.5) |
| Received single-dose ivermectin prophylaxis | 186 (5.3) |
| Received double-dose ivermectin prophylaxis | 2199 (62.2) |
| Symptoms suggestive of SARS-CoV-2 infection during follow-up | |
| Present | 331 (9.4) |
| Absent | 3201 (90.6) |
| Follow-up confirmation of COVID-19 by RT-PCR | |
| Positive | 201 (5.7) |
| Negative | 3331 (94.3) |