The federal government shutdown could be hazardous to the health of all Americans, according to Iowa Senator Tom Harkin. The Centers for Disease Control, which Harkin calls the world’s premiere public health agency, is closed. Less than two weeks ago, Harkin says the CDC identified frozen berries from the nation of Turkey as the cause of hundreds of people in several states being sickened by hepatitis-A. “The CDC detective epidemiological team went out, they recalled all this food and they stopped it before it spread any further,” Harkin says. “That team is at home now. They’re not working. What if...