Just as people should have a good doctor they can talk to and relate to, a cat should have a good vet. It is important to have their shots up to date. There are several different types of viruses that are very harmful to cats, and no matter how well you try and guard your cat, it can be exposed to them. A cat can be exposed to a virus in their own house, simply by associating with other pets outside your home, visitors or stepping in the virus outside from another animal. Also, most states if not all require a rabies vaccination. There is a one year and a three year rabies vaccination available, you can talk to your vet and see which best suits your cat. If your cat seems sick and does not seem to get better or worsens, it is best to take him to see a vet before it gets worse. It is best to be safe than sorry.

Vaccination schedule for most cats as outlined by the

Age	Vaccination
7 weeks	Combination Vaccine*: without Chlamydophilia (formerly called Chlamydia).
10 weeks	Combination vaccine: include Chlamydophilia where it is a concern. FeLV*: if the kitten is at risk of exposure to an infected cat; blood test prior to vaccination.
12 weeks or older	Rabies: Given by your local veterinarian (age at vaccination may vary according to local law).
13 weeks	Combination vaccine: include Chlamydophilia where it is a concern. FeLV*: for kittens at risk of exposure to an infected cat.
Adult	Combination vaccine: include Chlamydophilia where it is a concern. FeLV: for cats at risk of exposure. Rabies*: Given by your local veterinarian (time interval between vaccinations may vary according to law).
Consult with your local veterinarian to determine the appropriate vaccination schedule for your cat. Recommendations vary depending on the age and health status of the cat, the potential of the cat to be exposed to the disease, whether the cat remains indoors or also goes outdoors, the type of vaccine, whether the cat is used for breeding, and the geographical area where the cat lives or may visit. A combination vaccine includes panleukopenia, rhinotracheitis, and calicivirus. Some may also include Chlamydophilia (Chlamydia). FIV:* Cats should be tested prior to receiving an FIV vaccine. Consult your local veterinarian.