Because the body is not used to seeing this protein in the blood, it may develop antibodies to it, as if it were a foreign compound. (scientificamerican.com)
This is how it's done: blood plasma from a dog that survived the virus contains antibodies to it. (snowyswan.com)
Our breasts have an amazing antibody factory in them which takes germs from your baby and creates antibodies to them. (mothersnectar.ca)