No new cases have been reported since Sunday when the death toll was given as 67.
The Ebola outbreak in eastern Congo’s North Kivu province has now spread to neighboring Ituri province.
Since the outbreak was announced on May 8, there have been 49 cases. 22 have been confirmed by laboratory tests, 21 probable and six suspected.
Researchers investigated vegetation-cover changes near 27 populated areas where Ebola outbreaks occurred.
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