A vaccine prepared by isolating specimens of bacteria from an infected patient, culturing them, and killing them. By injecting this vaccine back into the patient, it was hoped that the body’s resistance to the infection would be stimulated. Although such vaccines were once much favored for the treatment of boils, there is no good evidence that the dead bacteria are any more likely to stimulate immunity than the living and dead bacteria already present in the body.
Vaccine prepared from a virus in the patient’s own body.