The most important would be to avoid areas where your dog will come in close contact with other dogs, especially stranger dogs to your buddy. (vetbabble.com)
Dogs who are in consistent closed contact with other dogs (such as in a kennel) are the most common victims. (harborpinesveterinarycenter.com)
If you live in an area where there has been an outbreak of dog flu, or your pet often comes into close contact with other dogs, it might be a good idea for him to get the shot. (lovinmypup.com)