Table 1.
Summary of incubation period estimates (unit: day) for cases infected by Omicron BA.1 variants and cases during Delta predominance period in South Korea.
| Type of SARS-CoV-2 strain | sample& |
estimate (95%CI) |
||||
|---|---|---|---|---|---|---|
| type of sample | sample size | mean | median | 95-th percentile | SD | |
| Omicron BA.1 | all samples | n = 22 | 3.5 (2.5, 3.8) | 3.3 (2.4, 3.7) | 6.0 (4.3, 6.6) | 1.4 (1.0, 1.5) |
| with exposure window | n = 21 | 3.2 (2.3, 3.8) | 3.1 (2.2, 3.6) | 5.5 (4.0, 6.6) | 1.3 (0.9, 1.5) | |
| those during Delta dominance$ | all samples | n = 64 | 6.5 (5.3, 7.7) | 5.9 (4.4, 7.1) | 13.6 (11.1, 15.9) | 3.7 (2.9, 4.6) |
| with exposure window | n = 12 | 8.7 (6.0, 11.6) | 8.1 (5.5, 11.0) | 16.0 (10.5, 21.0) | 3.8 (2.4, 5.6) | |
Notes
$ These cases were collected in June 2021 when the Delta variants were dominant at a prevalence of 68.3% in South Korea according to GISAID [11].
& The samples “with exposure window” are those with both lower and upper bounds of exposure date observed, whereas “all samples” included the samples with exposure window and sample with only upper bound of exposure date observed.