CDC director: We don't know if Ebola serum is helpful or harmful

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CDC director: We don't know if Ebola serum is helpful or harmful

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CDC director: We don't know if Ebola serum is helpful or harmful

by CBSTV Videos 1:10 mins

CDC director: We don't know if Ebola serum is helpful or harmful

by CBSTV Videos 1:10 mins

Tom Frieden, the director of the U.S. Centers for Disease Control and Prevention, weighs in during a congressional hearing on the current Ebola crisis in West Africa, which is on pace to sicken more people than all other previous outbreaks of the disease combined.

CBS News