Just as with humans, regular vaccinations are a very important part of your pet's health care routine. Vaccines help prepare the body's immune system to fight foreign organisms, protecting against multiple life-threatening diseases and providing your pet the best chance at a long, healthy life.
According to the American Animal Hospital Association's Canine Task Force, vaccines can be classified into three categories: core, non-core and not recommended. Core vaccines are those considered vital to all dogs; non-core are those determined based on outlying factors such as exposure risk, geographic location, etc.
Puppies and kittens should begin to receive vaccinations beginning at about 6-8 weeks, once the benefit of antibodies from its mother's milk is no longer in place.