A Texas doctor who is considered one of the world's leaders in Ebola research, says we need to chill out over fears of an Ebola 'epidemic' in the United States after two Americans who contracted the disease in West Africa were brought here for treatment. UTMB’s Tom Giesbert has spent decades studying Ebola and working on a vaccine. He says Ebola is not spread casually, like the flu, and Emory University Hospital in Atlanta is taking the most complete precautions he has ever seen. “State of the art protective gear, special isolators under negative pressure,” he said. “There is no such thing as zero chance of any trouble, but the odds are remote squared.”