Colbert: "What are the odds that I'm going to get Ebola?"

Sepkowitz: "Zero. Next question."

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Thanks for posting the link. I wouldn't interpret what he said as only directed to Colbert. It's normal for an interviewer to place him/herself as the subject where it's understood that the implied subject is [any other person like me in this region/nation]. He's being far more than "somewhat dismissive." Even if he (oddly) were only specifically addressing Colbert by saying zero, that would be presumptuous. But that's my take.