Cats are at risk from a multitude of infectious diseases.
An unvaccinated cat may become severely ill from one or more of these diseases and risk long-term illness, lameness, blindness or even death as a result. That is why it is so important for cats to be properly vaccinated. Feline Leukemia Virus is another infectious disease for which there exists a vaccine but it is not as easily transmitted to cats as the upper respiratory diseases. There is a new vaccine for FIP however, statistics are still being gathered on the extent of the protection it provides to cats. Symptoms include sudden onset of fever, lack of appetite, dehydration, depression, vomiting, dizziness.