Younger, healthier cats can live for years with the disease in remission. There are indications that some cats can develop tumors at the vaccination site although such incidences are rare. Your personal veterinarian will be able to discuss the pros and cons of vaccinating individual animals. There is a school of thought that cats can be bolstered by giving vaccinations to infected cats. However, this is controversial since some vaccines are weakened forms of the live virus and the cat already has a weakened immune system.
Some cats can live long and healthy lives while others contract diseases immediately.
Blood tests can show the presence of both viruses. Your veterinarian should always be notified if your cat has been infected since this could affect his administration of vaccines and other treatments. An infected cat should be kept away from uninfected cats and, therefore, must be kept indoors. A healthy, balanced and nutritious diet and good general care is the best way to maintain your cat's health for as long as possible. Minimizing stress and change is also helpful.