One of the largest Ebola outbreaks in history shows no signs of slowing — and the Trump administration barred US health experts who want to help at the outbreak’s epicenter in the Democratic Republic of Congo from traveling there. The relatively tepid response from the US, at a time when the outbreak is spiraling, has former CDC officials and global health experts concerned. “I do worry that in the worst-case scenario, we could have an outbreak of tens of thousands of people,” said Daniel Bausch, the director of the UK Public Health Rapid Support Team, “and complete destabilization of an already unstable region.”