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.
Plastics by the Numbers. # 1 1 â PET (Polyethylene Terephthalate) # 2 2 â HDPE (High-Density Polyethylene) # 3 3 â PVC (Polyvinyl Chloride) # 4 4 â LDPE (Low-Density Polyethylene) # 5 5 â PP (Polypropylene) # 6 6 â PS (Polystyrene) # 7 7 â Other (BPA, Polycarbonate and LEXAN)