Here you had a chemical, either from the natural world or artificially synthesized in the laboratory, and it would course through your body, it would find its target, lock into its target — a microbe or some part of a microbe — and then turn off a lock and a key with exquisite deftness, exquisite specificity.
Una sustancia química, ya bien del mundo natural o sintetizada artificialmente en el laboratorio, se abriría paso a través de su cuerpo, hasta encontrar su destino, y bloquear su objetivo, un microbio o parte de un microbio, para luego desactivarlo y mantenerlo bajo llave con exquisita destreza, y exquisita especificidad.