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Causes and Risk Factors

Canine parvovirus is caused by infection with CPV, most often, CPV-2a or CPV-2b. All dogs are at risk for developing canine parvovirus. Puppies less than 4 months old and dogs that have not been vaccinated against the virus are at increased risk for infection.

Newborn puppies receive antibodies from their mothers that help provide immunity, but immunity to CPV wears off before the puppies' immune systems are developed enough to destroy the virus and fight off infec...Read the full article