CDC Officials Still Don’t Know How Ebola Transmission Occurred In Dallas Hospital

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CDC Director Dr. Tom Frieden, pictured above at a Congressional hearing on the Ebola outbreak, said Thursday that officials are still investigating how two health care workers were exposed to the deadly virus at a Texas hospital.

CDC Director Dr. Tom Frieden, pictured above at a Congressional hearing on the Ebola outbreak, said Thursday that officials are still investigating how two health care workers were exposed to the deadly virus at a Texas hospital.

Centers for Disease Control and Prevention Director Dr. Tom Frieden told a House panel on Thursday that officials still don’t know exactly how two nurses contracted Ebola from Thomas Eric Duncan, the first person to be diagnosed with the virus in the United States.

Nina Pham and Amber Vinson, nurses at Texas Health Presbyterian Hospital Dallas, became ill after treating Duncan, who died earlier this month.

“While we do not yet know exactly how these transmissions occurred, they demonstrate the need to strengthen the procedures for infection-control protocols which allowed for exposure to the virus,” Dr. Frieden said while testifying at a hearing of the House Subcommittee on Oversight and Investigations.

Dr. Daniel Varga, the chief clinical officer of Texas Health Resources, which oversees the hospital, joined the hearing via teleconference and admitted to several mistakes, ranging from Duncan’s initial discharge from the emergency room and confusing messages about the timeline of events to the eventual transmission of the virus to the nurses.

Dr. Varga called Pham “an extremely skilled nurse” who used CDC-recommended protective measures when caring for Duncan.

“But it’s clear there was an exposure somewhere, sometime,” said Dr. Varga. “We are poring over records and observations, and doing all we can to find the answers.”

“We are working very hard to investigate the situation, but are not waiting for the completion of this investigation and have already helped the hospital implement new measures for safety,” Dr. Frieden said.

CDC officials are still investigating how nurses Nina Pham (center) and Amber Vinson (right) contracted Ebola while caring for Thomas Eric Duncan (left), the first patient diagnosed with the disease in the U.S.

CDC officials are still investigating how nurses Nina Pham (center) and Amber Vinson (right) contracted Ebola while caring for Thomas Eric Duncan (left), the first patient diagnosed with the disease in the U.S. at Texas Health Presbyterian Hospital.

The CDC has already recommended several policy changes for Texas Health Presbyterian Hospital, including decreasing the number of health workers who care for Ebola patients. The agency also suggested limiting staff interactions with the patients to only “essential procedures” and providing better training for how to use protective equipment.

Currently, officials are monitoring 125 people who had definite or possible contact with Duncan, including 76 hospital staff members who may have had contact with him when he was hospitalized. The Texas hospital has made rooms available for any staffers who want to self-isolate, out of an abundance of caution.

“We are doing this for our employees’ peace of mind and comfort,” a hospital spokesperson said. “This is not a medical recommendation.”

Meanwhile, Pham and Vinson will be cared for by other hospitals that specialize in caring for patients with highly virulent diseases like Ebola.

Vinson was transferred to Emory University Hospital in Atlanta on Wednesday, which has already nursed Ebola patients Dr. Kent Brantly, Nancy Writebol and an unnamed third patient back to health.

Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, confirmed at the hearing that Pham will be transported to the National Institutes of Health Clinical Center in Maryland.