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US works to step up Ebola aid, but is it enough?

The U.S. has a two-pronged strategy on Ebola: Increase desperately needed aid to West Africa and train U.S. medical workers for volunteer duty in the outbreak zone.

Read MoreEbola virus: 'Horrible way to die' and no vaccine

President Barack Obama has called the outbreak a national security priority. But the administration isn't saying how big a role the military will play or how quickly additional promised help will arrive.

Nurse Lucie Perardel puts on protective gear before entering a high-risk area at Elwa hospital in Monrovia, Liberia.
Dominique Faget | AFP | Getty Images
Nurse Lucie Perardel puts on protective gear before entering a high-risk area at Elwa hospital in Monrovia, Liberia.

Sen. Chris Coons, a Delaware Democrat, is calling for Obama to appoint a coordinator for the government's Ebola response.

The Centers for Disease Control and Prevention says it's preparing volunteer health workers to address a critical shortage of trained health professionals in Ebola treatment units in West Africa.

Read MoreEbola fears reach US shores: Hype or real threat?

Obama is to visit the CDC Tuesday to address the crisis. He'll also be briefed about the outbreak and discuss the U.S. response.

By The Associated Press