Radiogenic vaccines were a class of medications designed to protect an individual against radiation exposure. In 2377, the hologram of Reginald Barclay, after being reprogrammed by DaiMon Nunk, provided the crew of the USS Voyager with inoculations that would supposedly protect them against geodesic radiation. The Doctor, however, noticed that they were similar to standard Federation radiogenic vaccines, and would not be sufficient. (VOY: "Inside Man")