In this Thursday, Nov. 10, 2016 photo, a microbiologist demonstrates using a loop to work with bacteria at the Centers for Disease Control and Prevention in Atlanta. A March 2017 proposal to replace the Obama health care law would cut out a pillar of funding for the CDC, the nation's lead public health agency, and experts say that would likely curtail programs across the country to prevent problems like lead poisoning and hospital infections. (AP Photo/Branden Camp)