Sarcasm seems to fly right over your head.
Umaga died like 10 years ago. What’s he gotta do with EPO?
And a 2019 study showed those past 2017 results had tainted specimens. They had administered the wrong placebo. The 2019 study showed, EPO is in fact "performance enhancing".Meh.
A 2007 study showed that EPO has a significant effect on exercise performance, but a 2017 study showed that the effects of EPO administered to amateur cyclists was not distinguishable from a placebo.