Related how?

Biota (Life)
Virus (Viruses)
Riboviria
Orthornavirae
Pisuviricota
Pisoniviricetes
Picornavirales
Caliciviridae (Swine vesicular exanthema virus & relatives)

Norovirus (1142751)

Children (2 direct children, 3 direct and indirect children):

Norwalk virus (tree size 1)

Murine norovirus