[1] Different MWPyV isolates have a relatively large amount of sequence variation, up to approximately 5%; this pattern is similar to that seen in BK polyomavirus.

[1][6] Phylogenetic analyses of the MWPyV genome suggest different ancestries for the large tumor antigen and the major capsid protein VP1, implying that the virus might have evolved from an ancestral recombination event.

[1] In the 2015 taxonomic update to the polyomavirus group, the International Committee on Taxonomy of Viruses classified MWPyV in the genus Deltapolyomavirus.

It has been repeatedly found in stool samples from both healthy children and those suffering from diarrhea, with no obvious causal association.

[12] This rare disease is associated with susceptibility to human papillomavirus infections, but it is unclear whether the presence of MWPyV in this setting is clinically significant.