It is imperiative that your new puppy or dog is vaccined and gets annual boosters to aid the immune system. The following are common vaccines available and are explained also. One should seek a local vets opinion on when to vaccine there pet and what type of vaccine to administer. A booster annually should also be given to aid the dogs immune system.

Distemper - Distemper is a serious, often fatal, viral disease that affects primarily young, unvaccinated dogs. Symptoms of this nervous system disorder include a yellow or greenish discharge from the dog's eyes or nose, vomiting and diahhrea - all of which are very contagious. Other symptoms include coughing, difficulty breathing, increased body temperature, weight loss and diminished appetite.
Prevention against Distemper is extremely important as it can permanently damage the dog's nervous system, sense of smell, sight and sound.

Parvovirus - The Parvovirus is, unfortunately, the most common viral illness in dogs. Parvo is more likely to infect a puppy versus an adult dog. Vaccinating a puppy against Parvo is complicated because the maternal antibody can interfere with the vaccine. Which is why puppies receive the Parvo vaccine every three to four weeks, starting at six weeks of age, until they are between 16 and 20 weeks.

Corona - The Corona virus may cause the Parvo virus to become fatal, especially if the two infections occur concurrently. On the other hand, on its own, the Corona virus can cause minimal damage to the intestine and may also not even cause a clinical illness.

Bordetella - Bordetella is the most common cause of kennel cough (tracheobronchitis). The bacterial illness occurs mostly in dogs that congregate together at daycares, kennels or parks.

Para Influenza - Para influenza is a minor contributor to kennel cough, however, this vaccine is still found in almost all of the vaccine combinations.

Canine Hepatitis - Canine Hepatitis is a viral disease most commonly found in young (9-12 weeks) and unvaccinated puppies. The disease is spread by contact with urine from an infected dog. Symptoms include discharge from the nose or eyes, coughing or the evidence of liver and/or kidney disease, which is detected by jaundice, appetite loss, vomiting, as well as a change in drinking and urinating behaviour.

Giardia - Giardia is a rather new vaccine and deemed optional at this time. Giardia is a parasite that can cause chronic gastro-intestinal upset - mostly diarrhea - and can also be spread to humans.

Lyme Disease - Lyme Disease is caused by a bacterial organism carried by certain species of ticks. The necessity of this vaccine is determined by your location, as this is not prevalent in all areas.

Leptospirosis - Leptospirosis is a bacterial disease that is no longer prevalent in many countries, therefore, is not always given to dogs.
Which vaccines your dog receives and how often, is dependant on your location. Consult your veterinarian to create a schedule that is best suited to your dog and its needs.

(www.wikipedia.com- referenced)