Travel warning issued amid Ebola crisis

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The Centers for Disease Control and Prevention issued a heightened travel warning Thursday to countries with Ebola.

The so-called "level three alert" warns against all non-essential travel to countries coping with the outbreak.

According to the World Health Organization, 729 people have died from the virus in Guinea, Liberia, Sierra Leone and Nigeria since March.

CDC Director Thomas Frieden says even in a best-case scenario, it could easily take three to six months to stem the epidemic of Ebola in West Africa.

The CDC is sending 50 more workers to the region to try to fight the worsening outbreak.

Meantime, the president of Sierra Leone has declared a public health emergency as the Ebola crisis deepens across West Africa.

The announcement from President Ernest Bai Koroma late Wednesday came as neighboring Liberia also ramped up efforts to slow the virulent disease's spread.

Ebola has been blamed for more than 700 deaths in four West African countries this year, and has shown no signs of slowing down in Liberia and Sierra Leone.

Sierra Leone's leader said that police and military would be aiding health workers, and homes with Ebola patients will be quarantined. He says house-to-house searches will be used to trace those who may have come into contact with sick people.

Koroma declared Monday will be a "National Stay Home Day" in hopes of stopping Ebola's spread.

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