The CDC should send a response team to any new U.S. Ebola cases within 24 hours of their diagnosis, President Barack Obama said on Wednesday.
But he also warned that the outbreak had to be attacked at its source in west Africa, and that if it got out of control there it would spread globally.
Obama, speaking to reporters at the White House, said the CDC teams should ensure that proper disease protocols are being followed.
He also described the chances of a widespread Ebola outbreak in the United States as very low.
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The president spoke on the heels of disclosures Wednesday that Amber Vinson had become the second nurse at a Dallas hospital to be diagnosed with Ebola after treating a Liberian man who died there of the disease on Oct. 8. Nina Pham, another nurse at Texas Health Presbyterian Hospital, was diagnosed with Ebola last weekend.