All dogs are at risk of exposure to various infectious diseases, even if they spend most of their time indoors. Some infectious diseases are life-threatening while others, like rabies, also pose a public health risk. Vaccination to prevent common infectious diseases supports the first goal of medicine – disease prevention. Prevention of infectious disease is beneficial to your cat than treating it once it occurs. The animal’s natural immune system helps eliminate viral and bacterial infections. Thus, preventive vaccination is one of the most reliable and cost-effective methods of health care available to a pet owner.