Nano-virus

A nano-virus was used by the Cybermats to convert the crew of the GSO Arctic Drilling Station into Cyberslaves. The Eleventh Doctor and Amy Pond arrived at the base, with Amy almost being converted herself. The Doctor was able to turn the virus against the Cybermen, destroying their ship. He also found a cure for the virus and treated the survivors. (GAME: Blood of the Cybermen)