not everybody tested for doping in team sports. It is like a lottery. Maybe that was the reason, even Karch said the food in China has this kind of affect and they bring their own food. Maybe that was just the city last year? Would it be?
Someone else explained it better with medical words and stuff but i dont remember.
All I know is they were tested positive because of it and then case drop within a few months but they missed ECH last year. And god knows what an awful experience that was.
AFAIK, A good numbers of podium players were tested. Furthermore, 6 teams were living in the same hotel and eating the same food for almost a week during the competition. If the food were contaminated as you pretend, then it won't be only these two players were tested positively.