"We are just beginning to recover from our last public health crisis. And then this is an added public health crisis that is straining very limited resources and exacerbating preexisting chronic disparities," said Dr. Mona Hann-Attisha to PBS News Hour. Washing your hands with soap and water is the most important thing you can do to kill the virus. But many places can't do that. Hear from Dr. Mona on how the Flint Registry public health infrastructure is helping.