I agree that it's not the best term, but I don't think its so disqualifying that it makes the claim untrue: it's misleading at worst, and that imprecision only kinda interacts with the underlying claim.
I guess the better phrasing would be "Kansas tuberculosis outbreak is largest since (org) has been collecting data", which honestly doesn't change the implications for me.
I guess the better phrasing would be "Kansas tuberculosis outbreak is largest since (org) has been collecting data", which honestly doesn't change the implications for me.