Mistakes and missteps in the handling of the first Ebola case in the United States trouble lawmakers, international organizations and some public health experts who say the government needs to step up its strategy to contain the virus. "Where is the 1-800-Ebola hotline?" asked Gavin MacGregor-Skinner, an assistant professor of public health at Penn State University who helped set up an Ebola treatment clinic in Nigeria a few weeks ago.