Flint water crisis: Meet the residents who are feeling the health effects

Researcher says safe approach would be to assume that at this point all children in the Michigan community have been exposed to lead-contaminated water

At the beginning of 2015, Flint resident Lewenna Terry's then-9-year-old son started having problems concentrating.

Jaylon, now 10, went from being a student whose grades were consistently As and Bs to one with Cs and even Fs, his mother says.