Some vaccines and Antitoxins are administered in this way.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
9. Name the diseases for which we now have vaccines and Antitoxins.
"A Handbook of Health"
Woods Hutchinson
They are accompanied by fever, with headache, backache, and often chills; they "run their course" until the body has manufactured enough Antitoxins to stop them, and then they get well of their own accord.
"A Handbook of Health"
Woods Hutchinson