Table 2.
Comparison of the first and second episodes of COVID-19 among healthcare workers
| Variable | Frequency (%) | |||
|---|---|---|---|---|
| Reinfection (n=97) | Total | First episode | Second episode | Overlap |
| Symptoms | ||||
| Gastrointestinal | 56 (57.7) | 29 (29.9) | 49 (50.5) | 22 (22.7) |
| Neurological | 81(83.5) | 46 (47.4) | 75 (77.3) | 40 (41.2) |
| Respiratory | 75 (77.3) | 42 (43.3) | 71 (73.2) | 38 (39.2) |
| Asymptomatic | 23 (23.7) | 22 (22.7) | 1 (1) | 0 (0) |
| Flu-like symptom | 96 (99) | 65 (67) | 95 (97.9) | 64 (66) |
| Cardiovascular | 50 (51.5) | 19 (19.6) | 47 (48.5) | 16 (16.5) |
| Others | 14 (14.4) | 8 (8.2) | 8 (8.2) | 2 (2.1) |
| CT and CXR involvement | 49 (50.5) | 26 (27) | 38 (39) | 15 (14) |
| Hospitalization | 14 (14.4) | 8 (8) | 7 (7) | 1 (1) |
| ICU Admission | 3 (3.1) | 0 (0) | 3 (3.1) | 0 (0) |
| O2 therapy | 2 (2) | 2 (2) | 0 (0) | 0 (0) |
| Relapse (n=15) | ||||
| Symptoms | ||||
| Gastrointestinal | 13 (87) | 5 (29.4) | 12 (70.6) | 4 (23.5) |
| Neurological | 15 (100) | 11 (64.7) | 14 (82.4) | 10 (58.8) |
| Respiratory | 13 (87) | 6 (35.3) | 12 (70.6) | 5 (29.4) |
| Asymptomatic | 4 (23.5) | 4 (23.5) | 1 (5.9) | 1 (5.9) |
| Flu-like symptom | 14 (93.3) | 12 (70.6) | 14 (93.3) | 12 (70.6) |
| Cardiovascular | 9 (6) | 4 (23.5) | 8 (47.1) | 3 (17.6) |
| Others | 2 (13.3) | 1 (5.9) | 1 (5.9) | 0 (0) |
| CT and CXR involvement | 12 (8) | 8 (53) | 9 (60) | 5 (33) |
| Hospitalization | 2 (13.3) | 1 (6.7) | 2 (13.3) | 1 (6.7) |
| ICU Admission | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| O2 therapy | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Re-positivity (n=29) | ||||
| Symptoms | ||||
| Gastrointestinal | 17 (58.6) | 8 (26.7) | 14 (46.7) | 5 (16.7) |
| Neurological | 23 (79) | 13 (43.3) | 20 (66.7) | 10 (33.3) |
| Respiratory | 22 (76) | 7 (23.3) | 19 (63.3) | 4 (13.3) |
| Asymptomatic | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Flu-like symptom | 29 (100) | 24 (80) | 27 (90) | 22 (75.8) |
| Cardiovascular | 14 (48.2) | 4 (13.3) | 14 (46.7) | 4 (13.3) |
| Others | 3 (10.3) | 2 (6.7) | 1 (3.3) | 0 (0) |
| CT and CXR involvement | 16 (55.2) | 5 (17) | 14 (48) | 3 (10) |
| Hospitalization | 6 (20.7) | 1 (3.4) | 6 (20.7) | 1 (3.4) |
| ICU Admission | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| O2 therapy | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
Overlap: Patients who presented with a similar set of symptoms in both the first and second surge. Flu-like symptoms: Fever, chills, sore throat, sweating, myalgia, severe weakness, rhinorrhea, nasal congestion; Cardiovascular: palpitation, chest pain; Gastrointestinal: Abdominal pain, diarrhea, vomiting, loss of appetite; Neurological: Headache, anosmia, decreased level of consciousness, redness of the eye; Respiratory: Cough, dyspnea. ICU: Intensive care unit; COVID-19: coronavirus disease 2019; CT: Computed tomography; CXR: Chest X-ray.