The body has the ability to defend itself from many of the organisms that cause disease. As in humans, dogs get infections and heal without any intervention to heal.
However there are some viruses and bacteria that are harder to fight and also have the potential to kill or maim the dog. Fortunately there are vaccines for it.
Before adopting a dog, whether puppy or adult it’s necessary to find out about their vaccination. If he already had a shot would be dangerous to apply it again. If the former owner has a written record of the dog health checks, he/she should give it to you.
If you adopt adult dogs in a shelter, it is best to consult your veterinarian about what vaccinations to give him and at what time. Among the most important are Distemper, Parvovirus, Hepatitis, Leptospirosis and Rabies.
Remember that vaccines require multiple doses; the vet will tell you when you need to bring him for the next dose. It is important to give them in time to have full effectiveness. Finally, for the rest of the dog’s life, we must give him a multivalent reinforcement to ensure protection against disease.