This is an alphabetical list of biological virus families and subfamilies; it includes those families and subfamilies listed by the ICTV 2020 report. * For a list of individual species, see List of virus species. * For a list of virus genera, see List of virus genera. * For a list of virus realms, subrealms, kingdoms, subkingdoms, phyla, subphyla, classes, subclasses, orders, and suborders, see List of higher virus taxa.