FILE - In this Nov. 2, 2015, file photo, a pedestrian walks past a closed Chipotle restaurant in Seattle. Washington state health officials say they have found no source for the E. coli outbreak related to Chipotle and the chain's Pacific Northwest restaurants could reopen later this week. Washington state epidemiologist Dr. Scott Lindquist says all the tests of food from Chipotle stores in Washington and Oregon came back negative for E. coli. (AP Photo/Elaine Thompson, File)

“Screw-ups can occur in any kitchen, but obviously it’s more dramatic when it occurs in a kitchen that serves 5,000 people,” said Cieslak, who has helped investigate the E. coli outbreak that sickened about 40 people in Washington state and Oregon.

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FILE - In this combo of file photos, an operator of a fruit and vegetable stand near Denver holds a cantaloupe, Sept. 16, 2011, and untainted spinach grows near Castroville, Calif., Sept. 18, 2006. The Food and Drug Administration (FDA) issued new produce safety rules Friday in the wake of large foodborne illness outbreaks over the last decade, including deadly outbreaks linked to fresh spinach, cantaloupes and cucumbers.  (AP Photos/File)

Under the rules, the government soon will have new oversight of the farms that grow Americans’ food. That means, for example, making sure workers are trained to wash their hands, irrigation water is monitored for harmful bacteria and animals do not leave droppings in fields

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In this file photo dated Wednesday, Oct. 17, 2007, an overweight person eats in London, Wednesday, Oct. 17, 2007. (AP Photo/Kirsty Wigglesworth)

NEW YORK |  Obesity is still rising among American adults, despite more than a decade of public-awareness campaigns and other efforts to get people to watch their weight, and women have now overtaken men in the obese category, new government research shows. For the past several years, experts thought the nation’s alarming, decades-long rise in obesity […]

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Cancer survivor Christine Ells embraces her twenty-month-old son Jameson after arriving home from work in Whitman, Mass., Monday, Nov. 9, 2015. Ells, 36, a teacher in the Boston suburb of Quincy, developed a heart rhythm problem from several drugs she was given to treat the breast cancer she was diagnosed with at age 27. Certain cancer drugs, such as Herceptin and doxorubicin, sold as Adriamycin and other brands, can hurt the heart's ability to pump, and lead to heart failure. (AP Photo/Charles Krupa)

“If you wait until the disease has occurred, it may be too late” to do much good, said Dr. Javid Moslehi, who heads one such specialty clinic at Vanderbilt University. “We in the cardiology community have to do a better job of preventing cardiac disease rather than jumping in” after damage has occurred.

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