The first person to be diagnosed with
Ebola within the US has died, Texas hospital officials have said.
Travelers from Ebola-affected countries will face increased security scrutiny at five major US airports.
Passengers from Liberia, Sierra Leone and Guinea will have their temperatures taken and have to answer questions.
The new measures at O'Hare in Chicago, JFK and Newark in the New York area, Washington's Dulles, and Atlanta's airport will begin in the coming day
Travelers from Ebola-affected countries will face increased security scrutiny at five major US airports.
Passengers from Liberia, Sierra Leone and Guinea will have their temperatures taken and have to answer questions.
The new measures at O'Hare in Chicago, JFK and Newark in the New York area, Washington's Dulles, and Atlanta's airport will begin in the coming day
Thomas Eric Duncan, 42, who caught the virus in his native Liberia, was being treated with an experimental drug in isolation in a Dallas hospital.
A police officer who visited Mr Duncan's home is now reported to have Ebola-like symptoms and has been taken to hospital as a precaution.
Frisco Mayor Maher Maso described the risk as "minimal", but officials were taking "an abundance of caution"
Earlier the US announced new screening measures at entry points to check travelers for symptoms of the virus.
It has killed 3,865 people, mostly in Liberia, Sierra Leone and Guinea, in the worst Ebola outbreak yet.