“We are deeply concerned by the news that a health care worker in Texas has tested preliminarily positive for infection with Ebola Virus,” says CDC Director Dr. Thomas Frieden.

Frieden calls it a Breach of protocol.

"First we have to make sure that we do everything possible to care safely and effectively for this individual," Frieden says.

The announcement comes after a female nurse at the Texas Health Presbyterian Hospital developed a fever on Friday just weeks after caring for Thomas Duncan, the first person in the U.S. to contract the virus. He died last week.

The question now on everyone's mind is how. The CDC says she wore full protective gear---a gown, gloves, mask and shield--- during her multiple visits with Duncan.

All of those precautions are something Frieden says should have worked.

"The two areas where we will be looking particularly closely is the performance of kidney dialysis and respiratory intevation,” Frieden adds. “Both of those procedures may spread contaminated materials and are considered high-risk procedures."

As there are more questions than answers at this point, health care professionals like Dr. Wayne Johnson, Director of Emergency Services at Saint Vincent, says there is always a fear of getting an illness from a patient but he's confident in guidelines put forth by the CDC to make sure it doesn't happen here or anywhere.

We deal with many diseases every day so to answer the question, ‘Do we worry about catching an illness? We do. We take precautions to prevent that and we do believe we have enough precautions in place to prevent transmission from a patient to a health care worker," Johnson says.