Table 2.
Detailed overall sequencing results for both study periods.
| Study period | 1 | 2 | ||
|---|---|---|---|---|
| Time period | October 2020 | January – April 2021 | ||
| No. of assessed LTCFs | 21 | 45 | 55a | |
| Sample provenience | Residents | Residents | Staff | |
| No. PCR confirmed cases | 498 | 699 | 358 | |
| % (No.) sequenced | 74.3% (370) | 79.8% (558) | 84.1% (301) | |
| SARS-CoV-2 variant | A.27 | N/A | 0.2% (1) | 1.0% (3) |
| B.1 | 3.5% (13) | 0.2% (1) | 0.7% (2) | |
| B.1.1 | 0.3% (1) | N/A | 0.7% (2) | |
| B.1.1.7 | N/A | 5.0% (28) | 16.9% (51) | |
| B.1.1.58 | 2.9% (11) | 11.8% (66) | 1.3% (4) | |
| B.1.1.70 | 35.6% (133) | 3.9% (22) | 1.3% (4) | |
| B.1.146 | 2.4% (9) | 5.4% (30) | 4.3% (13) | |
| B.1.160 | 32.6% (122) | 2.0% (11) | 2.3% (7) | |
| B.1.177 | N/A | N/A | 0.3% (1) | |
| B.1.177.28 | N/A | N/A | 1.0% (3) | |
| B.1.177.44 | N/A | N/A | 0.3% (1) | |
| B.1.258 | 2.9% (11) | 6.1% (34) | 4.6% (14) | |
| B.1.258.17 | 18.2% (68) | 65.2% (364) | 63.6% (192) | |
| B.1.149 | N/A | N/A | 0.7% (2) | |
| B.1.531 | N/A | N/A | 0.3% (1) | |
| B.1.533 | N/A | 0.2% (1) | 0.3% (1) | |
| B.1.565 | N/A | N/A | 0.3% (1) | |
| C.35 | 1.6% (6) | N/A | N/A | |
a
This number is an approximation, as data about the exact work site was not accessible for all of the staff.