Key question: How did Dallas worker catch Ebola?

FILE - In this Oct. 5, 2014 file photo, hazardous material cleaners disinfectant their personal protective equipment after working in the apartment where Thomas Eric Duncan, the Ebola patient who traveled from Liberia to Dallas, stayed last week, in Dallas. The Homeland Security Department has ordered agents at airports and other ports of entry to observe everyone coming into the United States for potential signs of Ebola infection, officials said Wednesday. Homeland Security Deputy Secretary Alejandro Mayorkas said Customs and Border Protection agents are also handing out factsheets to travelers with details of what symptoms to look for and directions to call a doctor if they become sick within 21 days. (AP Photo/LM Otero, File)

(AP) – Officials are investigating how a Dallas health worker who treated an Ebola patient ended up with the disease herself.

They say the worker wore full protective gear while treating Thomas Eric Duncan, a Liberian man who died Wednesday at Texas Health Presbyterian Hospital. c

They are looking into how the worker removed her personal protective gear, which includes a gown, two sets of gloves, a face mask and an eye shield.

They also are examining the intensive medical procedures Duncan received. Those procedures include kidney dialysis and a breathing machine.

Both involve inserting tubes into blood vessels or an airway and can raise the risk of contact with bodily fluids.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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