Comprehensive Guide to Human Metapneumovirus (HMPV): Symptoms, Transmission, Diagnosis, Treatment, and Prevention 1. Introduction to HMPV Human metapneumovirus (HMPV) is a respiratory virus that belongs to the family Paramyxoviridae and genus Metapneumovirus. This virus was first isolated in 2001, and although it has since been recognized as a cause of significant respiratory infections, it has…