Exterior of the Center for Disease Control (CDC) headquarters on Oct. 13, 2014 in Atlanta.
Jessica McGowan—Getty Images
December 24, 2014 4:38 PM EST

Up to a dozen workers at the CDC’s Atlanta campus may have been exposed to a misplaced sample of the Ebola virus, agency officials said on Wednesday.

An agency spokesperson told the Washington Post that scientists mistakenly transferred the sample to an unsecured laboratory for testing. The technician who handled the sample and upwards of a dozen people in the area were being assessed for exposure risks.

A CDC official said the technician at greatest risk had not developed symptoms and would be monitored for 21 days. The exposure occurred Monday afternoon, and was discovered and rapidly escalated to supervisors by Tuesday.

Read more at the Washington Post.

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