(Photo: AP Photo/Courtesy of tcu360.com)

DALLAS (AP) — A Dallas nurse who caught Ebola while treating a Liberian patient who died of the disease has received a plasma transfusion donated by a doctor who beat the virus.

Ebola has killed more than 4,000 people in an outbreak the World Health Organization calls "the most severe, acute health emergency seen in modern times."

Federal health officials say they are ramping up training for medical workers who deal with the infected. Medical records indicate nurse Nina Pham was among about 70 hospital workers who cared for Thomas Eric Duncan.

Pham is the first person infected with Ebola in the U.S.

Family members and a mission group say Kent Brantly, a doctor who survived Ebola, has donated blood for a transfusion that could save the 26-year-old nurse.

Duncan died on Wednesday.

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