Investigation reveals CDC scientists kept quiet about lethal mistake

Investigation Reveals CDC Scientists Kept Quiet About Lethal Mistake

The CDC is under fire for another potentially dangerous mistake that scientists kept secret.

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Investigation reveals CDC scientists kept quiet about lethal mistake
US Centers for Disease Control and Prevention (CDC) Director Tom Frieden shows an awareness poster as he testifies before Africa, Global Health, Global Human Rights and International Organizations Subcommittee hearing on 'Combating the Ebola Threat' at the Rayburn House Office Building in Washington, DC, on August 7, 2014. Overwhelmed west African nations called states of emergency on Thursday as the death toll from a fast-spreading Ebola epidemic neared 1,000. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
MONROVIA, LIBERIA - AUGUST 13: Center for Disease Control and Prevention (CDC) Deputy of Global Health Athalia Christie arrives on a Delta Airlines flight from New York's JFK airport on August 13, 2014 near Monrovia, Liberia. The flight was also carrying the Ebola-flighting experimental ZMapp drug, which the Liberian government says will be used to treat Liberian doctors infected by the deadly virus. The current Ebola epidemic has killed more than 1,000 people in four West African countries. (Photo by John Moore/Getty Images)
MONROVIA, LIBERIA - AUGUST 13: A Centers of Disease Control (CDC), worker reviews his Liberian visa as a Delta Airlines flight from New York's JFK airport to Liberia prepares to land on August 13, 2014 near Monrovia, Liberia. The flight was carrying the Ebola-flighting experimental ZMapp drug, which the Liberian government says will be used to treat Liberian doctors infected by the deadly virus. The current Ebola epidemic has killed more than 1,000 people in four West African countries. (Photo by John Moore/Getty Images)
UNDATED: In this handout from the Center for Disease Control (CDC), a colorized transmission electron micrograph (TEM) of a Ebola virus virion is seen. As the Ebola virus continues to spread across parts of Africa, a second doctor infected with the disease has arrived in the U.S. for treatment. (Photo by Center for Disease Control (CDC) via Getty Images)
(L-R) French Economy minister Arnaud Montebourg, French Finance minister Michel Sapin, director of finance and market solutions, member of the general direction committee of Natixis Olivier Perquel speak during the signing of the first European obligation''Project Bond'' on numerical infrastructures on July 23, 2014 in Paris. The 'bond projects', launched during the summer of 2012, are a financial implement still experimental in Europe, which finances infrasctructure projects in specific domains (transport, energy, information and communication). AFP PHOTO/FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
(L-R) French Economy minister Arnaud Montebourg gestures as he speaks next to French Finance minister Michel Sapin, director of finance and market solutions, member of the general direction committee of Natixis Olivier Perquel, Pierre-Eric Saint-Andre, president of Axione infrastructure, European Investment Bank (EIB) vice-president Philippe De Fontaine Vive Curtaz and Europe's Digital Agenda commissioner Neelie Kroes during the signing of the first European obligation''Project Bond'' on numerical infrastructures on July 23, 2014 in Paris. The 'bond projects', launched during the summer of 2012, are a financial implement still experimental in Europe, which finances infrasctructure projects in specific domains (transport, energy, information and communication). AFP PHOTO/FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
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An internal investigation revealed a government scientist working at the headquarters in Atlanta accidentally mixed a deadly strain of bird flu, and then sent it to other labs back in January.

The lab worker reportedly realized a mistake was made, but didn't say anything. Fortunately, no one was infected, but scientists unknowingly worked with the dangerous mix for months before it was discovered.

CDC officials are calling the incident the most worrisome in a series of lab safety problems at the agency.

The same facility had an anthrax exposure scare in June that put more than 80 employees at risk to exposure.

Anthrax enclosed tubes were sent to lower security labs, but workers didn't follow proper safety procedures. They managed to disrupt the samples and remove the lids.

The FBI became involved in the internal investigation while the organization reviewed safety procedures with its employees.

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