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Table 1 Detected viruses in this study

From: Variation of human norovirus GII genotypes detected in Ibaraki, Japan, during 2012–2018

Season 2012/2013 2013/2014 2014/2015 2015/2016 2016/2017 2017/2018 Total Rate (%)
Samples 560 876 842 694 908 708 4,588  
NoV GI 36 40 129 18 3 18 244 5.3
NoV GII 268 471 347 332 631 388 2,437 53.1
 GII.2 35 7 1 35 493 112 683 14.9
 GII.4 186 262 187 108 53 234 1,030 22.4
 GII.6 15 161 4 7 13   200 4.4
 GII.17 1 19 96 108 34 21 279 6.1
 Other GII 31 22 59 74 38 21 242 5.3
RVA 28 36 5 50 7 7 133 2.9
SaV 20 13 37 51 16 62 199 4.3
AdV 1 12 7 8 9 16 53 1.2
AstV    5 1 3   9 0.2
  1. RVA rotavirus group A, SaV sapovirus, AdV adenovirus, AstV astrovirus