>actually do much of the damage associated with the disease. In most >diseases, a vaccine is made by taking antibodies and injecting them into >the subjects. The antibodies give the subject protection from the virus. >Injecting ADV antibodies into a healthy ferret Actually, most vaccines are made with killed or modified versions of the very virii they are meant to protect against. This is to stimulate the body to produce its *own* antibodies, which are then available to attack the real virus if it ever appears. Injecting ADV antibodies will not work because it does not stimulate the body to keep producing its own antibodies. Once the very few antibodies from the injection die, there is nothing to replace them, and therefore no protection. The difficulty with creating a ADV vaccine - or any vaccine for that matter - is to find an agent that will cause the body to create the appropriate antibodies - *without* causing a real infection at the same time. Roger & the Fibonacci Ferts [Posted in FML issue 3843]