A little extra about vaccination for dogs!

extrated from canismajor.com

How does a vaccination work?
In simplest terms, a vaccination stimulates the dog's immune system to protect itself against disease. When the antigen or infectious agent enters the dog's body, it is recognized as foreign and antibodies are produced to bind to it and destroy it. Even though the invader is gone, the cells that manufactured the antibodies "remember" it and will respond more quickly the next time the same agent is confronted.

Don't dogs get sick from a vaccination?
When vaccines were first being investigated, patients were actually given a less severe form of the disease or a related disease, with the idea that it was better to be a little bit sick now rather than a lot sicker later. Giving people cowpox to prevent smallpox was an early form of vaccination. Todays vaccines are attenuated (weakened), killed, or only pieces of the virus and don't actually transmit the disease.