cows
the animal was a cow and the vaccine was discovered by Edward Jenner who cured small pox as well
This is an old technique used to isolate attenuated organisms for use in vaccine development. Attenuation refers to rendering an organism (bacteria or virus) less virulent or pathogenic (less dangerous to humans). This is accomplished by infecting one animal, taking the infection from that animal to infect the next, and so on in a controlled manner. After several passages, the bacteria or virus is adapted to live in the animal host and not in humans and so can sometimes work as a vaccine. An example of this is the smallpox vaccine which was attenuated in cattle.
The small pox is technically considered eradicated, but cultures are kept in labs in the United States and Russia for observation and studying. Although cultures are kept in labs (and those cultures are the real small pox), it is technically considered eradicated.
Black panther
A man noticed how milkmaids did not get affected by smallpox, so they assumed that it was something to do with cows or milk that stopped them catching smallpox. I turns out that it was a similair, but less deadly, virus called cowpox that was preventing milkmaids getting smallpox. Cowpox was a vaccine against smallpox - meaning if you have had cowpox, you can't get smallpox.
cow
When a vaccine is given to an animal, the animal's immune system produces antibodies to fight off the disease. This way, if the animal is ever infected by the disease it was vaccinated against, the animal will either not get sick or not get as sick.
Black Panther
If you are bitten by a rabid animal, the vaccine can prevent the virus from infecting the central nervous system. See link below for more information:
You won't need a vaccine for this. When an animal starts urinating blood, this means that the kidneys are shot. You're better off to put the animal down, because eventually she will bleed to death.
Rabbit Calicivirus Disease cannot yet be grown in the laboratory, the RHD vaccine is made from a base of livers taken from deliberately infected rabbits in Spain. This is morally and ethically very hard to accept for true animal lovers that another animal dies to make the vaccine to save their own.
A few spring to mind (others at the link):Banting and Best did much of their early work on diabetes using dogs.The Salk (polio) vaccine was developed using monkeysPasteur used dogs in his studies on rabiesModern cloning techniques are based on animal tests