When puppies are born, they get immunity to disease through their mother's antibodies. These antibodies diminish as the pup grows, and vaccinations may not rebuild that immunity quickly enough to protect the pup from distemper and other diseases. Many veterinarians recommend that puppies be kept away from strange dogs for at least 12 weeks and preferable for 14-16 weeks to make sure the vaccines have replaced the immunity formerly provided by their mother. Distemper can be mild in dogs that are in good condition or severe in ill-nourished animals. It can be fatal, especially in young puppies or debilitated dogs.
Secondary infections can also be a problem.
Distemper is preventable by vaccination. Veterinarians vaccinate puppies and give yearly boosters with the annual checkup and some veterinarians run vaccination clinics at reduced rates. Owners of unvaccinated pets should get to a veterinarian for a preventive program. Those who choose shot clinics should make sure the vaccines are handled properly and are administered by a licensed professional. Rabies vaccine must be administered by a veterinarian according to Ohio law.