OMAHA, Neb. — An American photojournalist who contracted Ebola while working in Liberia is expected to arrive today in Nebraska where he will be treated for the virus that has ravaged West Africa.

Ashoka Mukpo, 33, will be the second Ebola patient to be treated at the Nebraska Medical Center’s isolation unit. Mukpo was working in Liberia as a freelance cameraman for NBC News when he became ill last week.

NBC reported Sunday evening that Mukpo had started his journey to the U.S. for treatment and that he would arrive this morning. Mukpo’s family said Friday he would be treated in Omaha. Hospital officials said they expected an Ebola patient to arrive today, but declined to provide a name.

Mukpo is the fifth American to return to the United States for treatment since the start of the latest Ebola outbreak, which the World Health Organization estimates has killed more than 3,400 people.

The hospital’s biocontainment unit was created in 2005 specifically to handle this kind of illness, said Dr. Phil Smith, who oversees the unit.

Mukpo’s father, Dr. Mitchell Levy, told NBC Sunday that his son was “counting the minutes” until he could leave Liberia but that he was not feeling that ill Sunday. Levy said the family was traveling from Rhode Island to Nebraska.