The adaptive immune system can learn to recognize certain targets. Vaccines expose the immune system to a target so that it can learn to recognize it and fight infections similar to the target at a later time. However, it may be possible to transfer the learned adaptive immunity from one individual into another individual who has never been exposed to the target. This could be achieved by extracting the memory B cells out of an immune individual and determining the DNA sequence of the antibody coding regions of these cells. These antibody coding regions could then be inserted in place of the antibody coding regions of some of the memory B cells of the non-immune individual. These modified B cells could then be inserted back into the non-immune individual to provide immunity.
