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. 2014 Nov;20(11):1828–1832. doi: 10.3201/eid2011.131601

Table. Seroprevalence of IgG antibody against norovirus GIV.1 and GIV.2 in human serum specimens, Italy, 2010–2011*.

NoV GIV virus-like particles
 Serum dilutions
 Total (%)
1:200 (%)
 1:400 (%)
GIV.1 78 (14.5) 40 (7.4) 118/535 (22.0)
GIV.2 12 (2.2) 14 (2.6) 26/535 (4.8)
GIV.1+GIV.2 3 (0.5) 4 (0.7) 7/535 (1.3)

*GIV; genogroup IV; NoV, norovirus.