VERSICAN Plus DHPPi (canine distemper, adenovirus, parvovirus & parainfluenza virus vaccine) is used to protect dogs against canine distemper, canine adenovirus (hepatitis), canine parvovirus, and canine parainfluenza. The "DHPPi" in the name refers to these four diseases: Distemper, Hepatitis (caused by adenovirus), Parvovirus, and Parainfluenza.