Further context on this from @WeAreForensic is that there were 15 AAFs for salbutamol in 2016, out of 200,000 samples. So that’s 0.0075%. So they’re rare. And all resulted in an anti-doping rule violation, as per Matt below. None of them had Froome’s legal might, clearly.
https://twitter.com/Scienceofsport/status/1014096311581380608Just to add some context to Dr Rabin's claim that Froome's case wasn't that unique (ie it happens but we don't know about it). I FOI-ed UKAD for its salbutamol adverse findings in last 10yrs. There were 11. As far as I can tell, every one resulted in an anti-doping rule violation