Fig. 2

Phylogenetic analyses of norovirus isolated from symptomatic and asymptomatic infections in our cohort study during 2021–2022. A Phylogenetic tree based on the ORF2 nucleotide sequence B Phylogenetic tree based on the RdRp nucleotide sequence. Reference strains were downloaded from GenBank and indicated by GenBank accession number/strain/name/year/country (JP, Japan; CHN, China; USA, United States; TH, Thailand; KOR, Korea; AU, Australia; VN, Vietnam; RUS, Russia; CA, Canada). Strains obtained from our study are labeled as strain/sample name/source (AC, asymptomatic individuals; SC, symptomatic individuals)/year. GII.4 labeled as red circle; GII.2 labeled as orange circle; GII.3 labeled as blue circle; GII.P31 labeled as red triangle; GII.P12 labeled as blue triangle; GII.P16 labeled as green triangle. Neighbor-joining (NJ) phylogenetic tree was constructed with MEGA 7 software and bootstrap tests (1000 replicates), based on the Kimura-2 parameter model. Scale bar indicates distances between sequence pairs