OMAHA, Neb. (AP) — The parents of an American video journalist who contracted Ebola in Liberia say they tried to talk him out of going there last month.

But 33-year-old Ashoka Mukpo couldn’t be dissuaded. He was flown to Omaha on Monday to be treated at the Nebraska Medical Center.

Mukpo’s father, Dr. Mitchell Levy, says his son wanted to help the people of Liberia because he lived there for two years while working with a nonprofit.

Diana Mukpo says she’s proud of his willingness to help others.

It’s not clear how Mukpo was infected, but Levy says it may have happened when he helped clean a vehicle in which someone had died.

Doctors are still evaluating Mukpo to determine how he will be treated.