The last blood samples from Athens have yet to be tested, but already athletes and the agencies that regulate them are looking ahead to the next summer Olympics where some experts believe the world could see its first genetically modified athletes in competition. While doping watchdogs have made major advances in combating drug use among athletes, advances in gene therapy has potentially put a whole new arsenal into the hands of cheats, says Dr. Colin Higgs, vice-president of scientific services for the International Council for Sport Science and Physical Education.
