Parvovirus B19, which causes fifth disease in humans, is a member of the Erythrovirus genus of the Parvoviridae. Prior to 2014, it was also the name applied to a genus within the subfamily Parvovirinae, but this has been amended to genus Protoparvovirus to avoid confusion between taxonomic levels.
PVC redirects here. For other uses, see PVC (disambiguation). Polyvinyl chloride (/ËpÉlivaÉªnÉl ËklÉÉraÉªd/), more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. PVC comes in two basic forms: rigid (sometimes abbreviated as RPVC) and flexible.
Types of Plastics. # 1 1 PET â Polyethylene Terephthalate. # 2 2 HDPE â High-Density Polyethylene. # 3 3 PVC â Polyvinyl Chloride. # 4 4 LDPE â Low Density Polyethylene. # 5 5 PP â Polypropylene. # 6 6 PS â Polystyrene. # 7 7 Unallocated References â Everything Else.