In our own day, blood transfusion has become an accepted, relatively uncontroversial medical therapy. We treat blood as a commodity, swapping units in and out of bodies as necessary. Yet in Lowers time, it was wholly new, and such experimentswhich he was one of the first to performwere met with fear and controversy, much of which hung on a seemingly simple question: when blood passes from one body into another, what does it carry with it? Find out more »