Table 1.
Characteristics of the different clusters
| Cluster A (internal medicine ward) |
Cluster B (internal medicine ward) |
Cluster C (surgical ward) |
Cluster D (surgical ward) |
||
|---|---|---|---|---|---|
| People affected, n (patients /HCW) | 13 (8/5) | 16 (12/4) | 27 (10/17) | 44 (10/34) | |
|
WGS available, n (%) Patients, n (%) HCWs, n (%) |
9 (69.2%) 5/8 (62.5%) 4/5 (80.0%) |
10 (62.5%) 8/12 (66.7%) 2/4 (50.0%) |
21 (77.8%) 7/10 (70.0%) 14/17 (82.4%) |
30 (68.2%) 8/10 (80.0%) 22/34 (64.7%) |
|
| Transmission among people with available sequencing data | |||||
| Confirmed, n (%) | 5* (55.6%) | 6 (60.0%) | 8 (38.1%) | 14 (46.7%) | |
| Ruled out, n (%) | 4 (44.4%) | 4 (40.0%) | 13 (61.9%) | 16 (53.3%) | |
|
People with genetically identical strains, n (%) Patients /HCW |
5* (38.5%) 4/1 |
6 (37.5%) 5/1 |
8 (29.6%) 2/6 |
14 (31.8%) 4/10 |
|
| Direct exposure | |||||
| Exposure between patients | 0 | 3 | 0 | 3 | |
| Exposure between patient and HCW | 0 | 1 (HCW) | 1 (P), 1 (HCW) | 0 | |
| Ward-based exposure | 4 (P), 1 (HCW) | 2 (P) | 1 (P), 5 (HCW) | 1 (P), 10 (HCW) | |
|
People with genetically distinct strains, n (%) Patients /HCW |
4 (30.8%) 1/3 |
4 (25.0%) 3/1 |
13 (48.1%) 5/8 |
16 (36.4%) 4/12 |
|
| Direct exposure | |||||
| Exposure between patients | 1 | 3 | 0 | 3 | |
| Exposure between patient and HCW | 1 (HCW) | 1 (HCW) | 3 (HCW) | 2 (HCW) | |
| Ward-based exposure | 2 (HCW) | 0 | 5 (P), 5 (HCW) | 1 (P), 10 (HCW) | |
|
People with missing sequencing data, n (%) Patients /HCW |
4 (30.8%) 3/1 |
6 (37.5%) 4/2 |
6 (22.2%) 3/3 |
14 (31.8%) 2/12 |
|
| Direct exposure | |||||
| Exposure between patients | 2 | 2 | 3 | 0 | |
| Exposure between patient and HCW | 0 | 0 | 0 | 3 (HCW) | |
| Ward-based exposure | 1 (P), 1 (HCW) | 2 (P), 2 (HCW) | 3 (HCW) | 2 (P), 9 (HCW) | |
| Main virus lineage | B.1.160 | B.1.160 | B.1.177 | B.1.177 | |
| Department screenings, n (Patients /HCW) | 2/2 | 3/0 | 2/2 | 3/2 | |
| Clinical course (Patients) | |||||
| Asymptomatic | 2 | 0 | 6 | 2 | |
| Symptomatic | 2 | 9 | 3 | 6 | |
| Deceased | 4 | 2 | 0 | 2 | |
| Unknown | 0 | 1 | 1 | 0 | |
*Consists of two different clusters (two and three identical virus-strains, respectively)
HCW Health-care worker, WGS Whole genome sequencing, P Patient