>> am i right that there's no easy way to test overall exposure if if you're showing a lowell elevatored blood lead level, but you were exposed, your kids were exposed a long time ago, is there no easy way to test to show that long-term exposure? >> you could do a bone biopsy, but nobody's really signed up for that. so no, there's not great ways to tests past exposure. that's why we're under the assumption that the entire population was exposed and thus the entire population needs to benefit from interventions to mitigate that long-term exposure. >> we also got news about this legionnaires' disease outbreak. do you have information about whether that's related to this or how serious that is to flint? >> that's an adult disease, and i'm a kids doctor. but it does seem this corrosive water could be implicated. mona hannah attisha, thanks for joining us. one thing we're going to talk