— The United States has urged people in Sierra Leon, the most affected part of the country in the Ebola outbreak, to stay home and monitor their symptoms.
The U.S. Centers for Disease Control and Prevention issued a warning Thursday that some people have become more likely to develop symptoms after returning from Sierra Leone, and that the country’s public health authorities have reported more than 6,000 cases of Ebola.
The CDC also said a nurse working for the U.N. mission in Sierra Rojo has tested positive for the virus.
That nurse has tested negative for Ebola.
Sierra Leone, the world’s second-largest economy, has been struggling with a deadly outbreak of the virus that has claimed at least 1,500 lives.
More than 3,000 people are known to have contracted the virus and another 7,000 have died.
The WHO has said there are no known cases of the disease in Liberia, Sierra Leone and Guinea, which are both still battling the epidemic.
The virus was first discovered in Guinea in 1976 and has spread to more than 80 countries.
There have been nearly 6,800 deaths, more than 200,000 infections and more than 20 million cases of infectious diseases worldwide.