The Russians allowed to participate in South Korea were subjected to what Olympics officials described as a rigorous testing regimen , and have found themselves under scrutiny from testers as the event has progressed.
“On the one hand it is extremely disappointing when prohibited substances might have been used, but on the other hand it shows the effectiveness of the antidoping system at the Games, which protects the rights of all the clean athletes,” the International Olympic Committee said in a statement Sunday.
Meldonium caused confusion among Russian athletes when it was added to the list of banned substances by the World Anti Doping Agency. Scores of athletes, including former five-time Grand Slam tennis champion Maria Sharapova, tested positive for it.
The antidoping agency eventually ruled that more research was required to understand how long the substance, known as mildronite in Russia, remained in the system, as some athletes claimed they had consumed it before the ban had come into force.
Many of the athletes involved, though not Sharapova, eventually had their suspensions lifted because it was not clear when…