Fig. 1.

Maximum likelihood tree for 502 unique full capsid gene sequences (nt positions 5,085–6,702 on the basis of X86557) from the FoodBorne Viruses in Europe database (http://www.rivm.nl/pubmpf/norovirus/database#/outbreaks/list) and Genbank. Clades are condensed (triangles) to the genotype level, assigned according to the publicly available typing tool http://www.rivm.nl/mpf/norovirus/typingtool. A nexus file is provided in electronic supplementary material 2, providing the possibility to see the tree in detail