Ebola Virus Particles - Photo by NIAID

As many as a dozen scientists may have been exposed to the Ebola virus at a lab of the Centers for Disease Control and Prevention in Atlanta, agency officials said Wednesday.

The potential exposure took place Monday when scientists conducting research on the virus at a high-security lab mistakenly put a sample containing the potentially infectious virus in a place where it was transferred for processing to another CDC lab, also in Atlanta on the CDC campus.

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