Versican Plus DHPPi/L4R (live, attenuated canine distemper, adenovirus, parvovirus, parainfluenza & leptospira vaccine) is used to protect dogs against canine distemper, canine adenovirus (types 1 and 2), canine parvovirus, canine parainfluenza, leptospirosis, and rabies. The vaccine contains live attenuated (weakened) versions of the viral components and inactivated (killed) Leptospira and rabies components.