| Comorbidities | Count | Percent | P-value |
| Asthma | 5 | 15.2% | 0.035 |
| Cancer/Immunodeficiency | 2 | 6.1% | 0.987 |
| Chronic lung disease | 2 | 6.1% | 0.046 |
| Cardiac disease | 1 | 3.0% | 0.721 |
| Hypertension | 1 | 3.0% | 0.684 |
| Diabetes mellitus | 1 | 3.0% | 0.654 |