From: Comparison of six antibody assays and two combination assays for COVID-19
Days from symptom onset | Total patients, no | Seropositive patients*, no. (%) | Total collected samples, no | Samples with positive result**, no. (%) | Elecsys, no. (%) | SuperFlex_Ab, no. (%) | SuperFlex_IgM, no. (%) | SuperFlex_IgG, no. (%) | SuperFlex_any†, no. (%) | iFlash_IgM, no. (%) | iFlash_IgG, no. (%) | iFlash_any#, no. (%) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day 1–7 | 23 | 14 (60.9%) | 53 | 24 (45.3%) | 16 (30.2%) | 18 (34.0%) | 3 (5.7%) | 11 (20.8%) | 18 (34.0%) | 8 (15.1%) | 19 (35.8%) | 19 (35.8%) |
Day 8–14 | 39 | 32 (82.1%) | 109 | 82 (75.2%) | 66 (60.6%) | 69 (63.3%) | 18 (16.5%) | 61 (56.0%) | 71 (65.1%) | 34 (31.2%) | 71 (65.1%) | 71 (65.1%) |
Day 1–14 total | 62 | 46 (74.2%) | 162 | 106 (65.4%) | 82 (50.6%) | 87 (53.7%) | 21 (13.0%) | 72 (44.4%) | 89 (54.9%) | 42 (25.9%) | 90 (55.6%) | 90 (55.6%) |
Day 15–21 | 29 | 29 (100%) | 78 | 77 (98.7%) | 76 (97.4%) | 76 (97.4%) | 47 (60.3%) | 76 (97.4%) | 76 (97.4%) | 50 (64.1%) | 77 (98.7%) | 77 (98.7%) |
Day 22–28 | 19 | 19 (100%) | 45 | 45 (100%) | 45 (100%) | 45 (100%) | 33 (73.3%) | 45 (100%) | 45 (100%) | 37 (82.2%) | 45 (100%) | 45 (100%) |
Day 29–56 | 15 | 15 (100%) | 80 | 80 (100%) | 74 (92.5%) | 80 (100%) | 35 (43.8%) | 80 (100%) | 80 (100%) | 25 (31.3%) | 80 (100%) | 80 (100%) |
Day 57–84 | 6 | 6 (100%) | 20 | 20 (100%) | 20 (100%) | 20 (100%) | 3 (15.0%) | 20 (100%) | 20 (100%) | 1 (5.0%) | 20 (100%) | 20 (100%) |
Day 85–112 | 1 | 1 (100%) | 12 | 12 (100%) | 12 (100%) | 12 (100%) | 0 (0%) | 12 (100%) | 12 (100%) | 0 (0%) | 12 (100%) | 12 (100%) |
Day 113–140 | 2 | 2 (100%) | 14 | 14 (100%) | 14 (100%) | 14 (100%) | 0 (0%) | 14 (100%) | 14 (100%) | 0 (0%) | 14 (100%) | 14 (100%) |
Day 141–182 | 2 | 2 (100%) | 27 | 27 (100%) | 25 (92.6%) | 27 (100%) | 0 (0%) | 27 (100%) | 27 (100%) | 0 (0%) | 22 (81.5%) | 22 (81.5%) |
Day 15–182 total | 74 | 74 (100%) | 276 | 275 (99.6%) | 266 (96.4%) | 274 (99.3%) | 118 (42.8%) | 274 (99.3%) | 274 (99.3%) | 113 (40.9%) | 270 (97.8%) | 270 (97.8%) |
Total | 136 | 120 (88.2%) | 438 | 381 (87.0%) | 348 (79.5%) | 361 (82.4%) | 139 (31.7%) | 346 (79.0%) | 363 (82.9%) | 155 (35.4%) | 360 (82.2%) | 360 (82.2%) |