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tsr marsh dnt airport ebola fears_00002018.jpg

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    Expert: 'There must've been a failure'

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Expert: 'There must've been a failure'

Wolf Blitzer speaks to Ebola expert Dr. Alexander van Tulleken about what might've caused a Spanish nurse to get Ebola.

Expert: 'There must've been a failure'

Wolf Blitzer speaks to Ebola expert Dr. Alexander van Tulleken about what might've caused a Spanish nurse to get Ebola.