Risk level determination after a risky exposure
| Index case mask-wearing status | PPE using status of HCW | Risk level |
| No | Did not use a surgical mask or N95 | High |
| Used a surgical mask in case of N95 indication | Moderate | |
| Did not use eye protection | Low | |
| Did not use gloves and aprons | Low | |
| Used all PPE properly | No | |
| Yes | Did not use a medical mask or N95 or Used a surgical mask in case of N95 indication | Moderate |
| Did not use eye protection | Low | |
| Did not use gloves and aprons | Low | |
| Used all PPE properly | No |
HCW, healthcare worker; PPE, personal protective equipment.