Entire litters may still develop parvo even after administering vaccines accordingly because the vaccine can't provide sufficient protection against certain aggressive strains of the parvovirus such as CPV-2c.
Your dog will require a parvo booster vaccine when he reaches his first birthday, and subsequent booster vaccines every one to three years thereafter, depending on the veterinarian's advice.
Maintaining a clean environment, limiting the puppy's contact with other dogs and maintaining a vaccine schedule can all help prevent a puppy from contracting the parvo virus.
Maternal antibodies within the puppy will render the parvo virus ineffective, but the plummeting number of antibodies may not offer sufficient protection against parvo.
Puppies should receive their first parvo vaccine between five to eight weeks old using a high antigen-density vaccine, according to the Merck Veterinary Manual.