Table 1.
Summary of strains in each group collected at different years
| 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | Total | ||
|---|---|---|---|---|---|---|---|---|
| G1a | 0 | 0 | 2 | 8 | 12 | 2 | 24 | |
| G1b | 3 | 29 | 28 | 22 | 21 | 15 | 118 | |
| G2a | ||||||||
| Clade 1 | 0 | 2 | 8 | 23 | 87 | 26 | 146 | |
| Clade 2 | 0 | 0 | 10 | 66 | 112 | 64 | 252 | |
| Total | 0 | 2 | 18 | 89 | 199 | 90 | 398 | |
| G2b | ||||||||
| Clade 3 | 0 | 25 | 17 | 10 | 49 | 12 | 113 | |
| Clade 4 | 0 | 0 | 19 | 33 | 45 | 21 | 118 | |
| Clade 5 | 11 | 24 | 26 | 49 | 65 | 29 | 204 | |
| Clade 6 | 28 | 92 | 55 | 59 | 20 | 6 | 260 | |
| Total | 39 | 141 | 117 | 151 | 179 | 68 | 695 | |
This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.