Parvo Virus
Disease associated with the canine parvovirus started appearing around 1978. It is postulated that this virus is a mutation of the feline distemper virus. Since so few dogs had developed natural antibodies in the late 1970's, a large number of dogs died from this disease. In some cases, the virus affected the heart, and caused death within a few hours. We can still remember people coming into our clinic in droves to get their dogs vaccinated. There was no parvo vaccine for dogs then, since we did not even know what parvo was. The vaccine we gave initially was the