Parvovirus is the common name applied to all the viruses in the Parvoviridae taxonomic family. Parvovirus is a linear, single-stranded DNA virus, which has an average genome size of 5,000 nucleotides. Parvoviruses are among the smallest viruses (hence the name, from Latin parvus meaning small) and are 18–28 nm in diameter. The Parvoviridae family has two subfamilies; the Parvovirinae (vertebrate viruses) and the Densovirinae (invertebrate viruses).  https://www.creative-biolabs.com/vaccine/recombinant-parvovirus-b19-vp1-vp2-protein-478.htm.