“The fever-screening instruments run low and aren’t that accurate,” said infection control specialist Sean Kaufman, president of Behavioral-Based Improvement Solutions, a biosafety company based in Atlanta. “And people can take ibuprofen to reduce their fever enough to pass screening, and why wouldn’t they? If it will get them on a plane so they can come to the United States and get effective treatment after they’re exposed to Ebola, wouldn’t you do that to save your life?” On Thursday, Liberia said the first Ebola patient to be diagnosed in the United States had lied on a questionnaire at Monrovia’s airport about his exposure to an Ebola patient. Thomas Eric Duncan’s arrival and hospitalization in Dallas have underscored how much U.S. authorities are relying on their counterparts in West African countries to screen passengers and contain the worst Ebola outbreak on record.