How is antivenom made?

Hi my name is Brett. I do not know if all antivenom is made this way. But apparently for snake antivenom it is. First they will milk the snake for its venom then inject small dosages of the venom into a horse or goat. The Horse will build up antibodies to the venom until it is almost immune to it. The antibodies are then extracted from the blood of the horse and purified into a serum. This is just a broad description of what the process is. For a more detailed description try this website. Yahoo.com/20000803.html">http://ask.Yahoo.com/20000803.html