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Dr. Thomas Frieden, director of the U.S. Centers for Disease Control and Prevention, said the first patient diagnosed with Ebola in the U.S. has "taken a turn for the worse."
Duncan, now being treated at Texas Health Presbyterian Hospital, was sent home after his first visit to the emergency room, despite telling a nurse there that he had just been to Liberia.
"Many people have pointed out that initially the individual was not diagnosed," Frieden told a news conference. "We'll be doing a lot more in the coming days and weeks to inform and empower not just doctors and nurses, healthcare professionals of all kinds, to think about Ebola," he wend on to say.
The governments of Guinea, Sierra Leone and Liberia are struggling to contain the worst outbreak on record of the deadly hemorrhagic fever.
The World Health Organization on Friday updated its death toll to at least 3,439 out of 7,492 suspected, probable or confirmed cases.
