Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) - The deadly Ebola virus outbreak in West Africa has hit "unprecedented" proportions, according to relief workers on the ground.
"The epidemic is out of control," Dr. Bart Janssens, director of operations for Doctors Without Borders, said in a statement.
There have been 567 cases and 350 deaths since the epidemic began in March, according to the latest World Health Organization figures.