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Associated Press
In this Friday, June 12, 2015 photo, Martin Meltzer sits for a portrait at the Centers for Disease Control and Prevention in Atlanta. Meltzer, a disease modeler for the nation's pre-eminent public health agency, is wary of proposals for greater collaboration or reliance on non-agency modelers. And more sophisticated models do not interest him. "Accuracy for the sake of accuracy is merely interesting," he said. "And interesting is not good enough." (AP Photo/David Goldman)

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