The German Aderlass police investigation, which began in 2019, discovered a blood doping network that spanned various sports and resulted in the arrest and suspension of many professional cyclists." I don’t have any great concern that it’s going on but it’s better to be safe than sorry, so why not put a definite measure in place to make sure it doesn’t happen,” said Vaughters.
Early-morning blood tests are done during large events. To discourage riders from transfusing blood for a specific race or stage, additional tests might be performed on the team bus in the last hour before a race start. But teams and
UCI are not happy with this method and want to find a different way to combat the issue.