A man is hospitalized after contracting Ebola while visiting family in West Africa.
A doctor at the University of Arizona has tested positive for the disease.
He is the first person to test positive in the U.S. for the virus.
Officials say he has no history of contracting the disease in the country.
The patient was treated for the illness at a Phoenix hospital.
He was released after about an hour of observation.
The CDC says the man is not being tested for Ebola.
The patient had traveled to Liberia and Sierra Leone to help fight the Ebola outbreak.