Government scientists play essential roles in our country's top public health achievements. From food-safety improvements to tobacco cessation, we rely on them to warn us of health risks, identify solutions, and create standards that promote public health. The Trump administration puts our health at risk when it instructs science-based agencies to halt communications; requires political-appointee review of EPA science; gives attention to people who make dangerous and uniformed statements about vaccines; and selects an EPA administrator who ignores decades of evidence on climate change.…