Another U.S. doctor in Liberia tests positive for Ebola

A U.S. physician working in Liberia has tested positive for Ebola, the missionary organization SIM USA announced Tuesday.

The unnamed missionary doctor was treating obstetrics patients at the organization's ELWA hospital in Monrovia, Liberia, and was not working with Ebola patients in the facility's isolation unit, which is separate from the main hospital, according to a news release from the organization. He isolated himself immediately upon developing symptoms and has been transferred to the Ebola isolation unit.