Canine Parvovirus(CPV) is mainly infected through direct and indirect contact, such as the feces, urine, vomit and saliva of sick dogs, food and bedding contaminated with the virus, etc. In addition, humans and insects may also be carriers of viruses, and your dog may also be infected by external exposure to the virus.
Dogs of different breeds and ages can be infected, but puppies between 6 and 20 weeks of age and unvaccinated or incompletely vaccinated dogs have very high rates of infection and mortality. Additionally, some dog breeds are at higher risk for Canine Parvovirus(CPV), such as the Rottweiler, Doberman pinscher, American Bulldog, English Springer Spaniel, and German Shepherd.