President Barack Obama on Wednesday thanked health care workers at a Texas hospital for dealing with the first cases of Ebola to appear in the U.S.  

In a phone call, Obama emphasized the importance of integrating lessons learned from Texas Health Presbyterian Hospital in Dallas into response plans, and reviewed additional steps to be taken to respond to any new Ebola cases that might emerge, according to a statement by the White House 

Earlier Wednesday, the president met with his Ebola Response Coordinator Ron Klain and members of his team coordinating the government's response to the virus. 

Obama said he is "cautiously more optimistic" about the situation in the U.S. after dozens of people who had contact with the U.S’ first Ebola patient, Thomas Eric Duncan, were found not to have been infected by the virus. 

The Centers for Disease Control and Prevention announced Wednesday that beginning Oct. 27 U.S. public health authorities will monitor for Ebola all travelers into the U.S. whose trips originates from three West African nations.  

Passengers from Guinea, Liberia and Sierra Leone not showing illness or symptoms consistent with Ebola will be tracked daily by for 21 days from the date of their departure from West Africa. Ebola has a 21-day incubation period. Passengers who exhibit symptoms will be immediately isolated and treated.

Travelers will be required to report their temperatures and any other symptoms such as headaches, muscle aches and diarrhea. They will also be required to inform authorities about their travel pans within the U.S.

Anadolu Agency