Nurse on flights may have had more advanced case of Ebola

The nurse who flew between Dallas and Cleveland and later tested positive for Ebola may have been at a more advanced stage of the disease than perviously thought, the president of Frontier Airlines said.

{mosads}Barry Biffle notified employees on Friday about the findings from the Centers for Disease Control and Prevention, the Associated Press reports.

The CDC has said those diagnosed with Ebola are more contagious as the disease advances, and when symptoms progress. 

The CDC reassured the airline company that crew members on the flights are at low risk of exposure to the disease, Biffle said.

Frontier put the pilots and flight attendants on leave for 21 days, which health experts say is the maximum amount of days it could take someone exposed to Ebola to become sick.

All passengers on the flight with the nurse Amber Joy Vinson have been notified, Biffle said.