FIG. 3.

Phylogenetic dendrograms of norovirus from Berlin outbreaks in 2004 based on the ORF1 (A) and ORF2 (B) gene of NV. Alignment of all sequence data for the outbreak strains was performed by the neighbor-joining method. The calibration bar denotes divergence of 1%. NV GGI strains were named with reference to the identifying local health department (Table 3).