Despite the availability of vaccines, many dogs are affected each year by parvovirus, leptospirosis and kennel cough. Should an unvaccinated dog or puppy come into contact with one of these diseases, it could prove to be fatal. Those that recover may be left with long-term damage to vital organs. There is no need for this to happen as a dog can be protected through a couple of injections as a puppy and then regular boosters throughout his life.