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Distribution of norovirus outbreaks by genogroups
| Genogroup | July 2012–June 2013 | July 2013–June 2014 | July 2014–June 2015 | July 2015–June 2016 | July 2016–June 2017 | July 2017- Feb 2018 | Total |
|---|---|---|---|---|---|---|---|
| GI | 40 | 6 | 6 | 18 | 4 | 9 | 83 |
| GII | 103 | 96 | 85 | 60 | 35 | 61 | 440 |
| Mixed GI and GII | 5 | 1 | 1 | 0 | 0 | 0 | 7 |
| TOTAL | 148 | 103 | 92 | 78 | 39 | 70 | 530 |
| GI sequenced (%) | 34 (75.6) | 5 (71.4) | 5 (71.4) | 17 (94.4) | 1 (25) | 8 (88.9) | 70 (77.8) |
| GII sequenced (%) | 100 (92.6) | 87 (89.7) | 77 (89.5) | 55 (91.7) | 33 (94.3) | 60 (98.4) | 412 (92.2) |
