Table 1.
COVID-19 Clusters in a Health Care System With Suspected Nosocomial Transmission Based on Contact Tracing
| Cluster | Setting: Initial Cases and Contacts | Dates Initial to Final Case | No. Symptomatic COVID-19 Cases | No. Asymptomatic Cases/No. Screened (%) |
|---|---|---|---|---|
| A | Medical ward: 2 nurses with multiple coworker and patient contacts | 6/19/20–7/1/20 | 13 employees 1 patient |
1/36 (2.8) employees 1/31 (3.2) patients |
| B | Outpatient clinic: optometrist with multiple patient contacts | 10/26/20–10/28/20 | 1 employee 0 patients |
2/10 (20) patients |
| C | Medical ward: nursing assistant with multiple coworker contacts | 11/2/20–11/5/20 | 4 employees 0 patients |
2/87 (2.3) employees |
| D | Outpatient clinic: 4 nurses in shared workspace | 10/21/20–10/28/20 | 4 employees 0 patients |
N/A |
| E | Outpatient clinic: 6 employees working in different areas infected | 10/29/20–11/10/20 | 6 employees 0 patients |
9/114 (7.9) employees |
| F | Outpatient clinic: physical therapist with patient and coworker contacts | 11/3/20–12/1/20 | 13 employees 0 patients |
3/85 (3.5) employees 1/15 (6.7) patients |
| G | Spinal cord injury unit: nurse with coworker and patient contacts | 10/15/20–11/10/20 | 2 employees 0 patients |
5/85 (5.9) employees 0/26 (0) patients |
| H | Emergency department: 6 coworkers in shared workspace infected | 7/8/20–7/25/20 | 6 employees 0 patients |
3/96 (3.1) employees |
| I | Outpatient clinic: nurse with coworker contacts | 11/5/20–11/30/20 | 9 employees 0 patients |
6/109 (3.7) employees |
| J | Sleep lab: nursing assistant with coworker exposures | 11/6/20–11/10/20 | 3 employees 0 patients |
0/22 (0) employees |
| K | Outpatient clinic: 2 medical technologists with coworker contacts | 12/24/20–1/5/20 | 5 employees 0 patients |
3/26 (11.5) employees |
| L | Radiology: 4 staff cases with coworker contacts | 11/27/20–12/1/20 | 4 employees 0 patients |
0/16 (0) employees |
| M | Vascular lab: lab technician with coworker contacts | 12/10/20–12/31/20 | 7 employees 0 patients |
0/12 (0) employees |
| N | Outpatient clinic: 3 nurses in shared workspace with coworker contacts | 12/9/20–12/29/20 | 4 employees 0 patients |
1/32 (3.1) employees |
Abbreviation: COVID-19, coronavirus disease 2019.