A black doctor being treated for Ebola in Nebraska died Monday morning. Dr. Martin Salia, became infected with the virus while treating patients in Sierra Leone. He was a legal resident living in Maryland with his wife and children.

Last Tuesday, it was reported that Craig Spencer that the last U.S. Ebola patient was declared virus-free and he was released from a New York hospital after the city's health department said he did not pose a public health risk.

Saturday afternoon, Dr. Martin Salia arrived  in Omaha, Nebraska at the request of the U.S. State Department and was placed on dialysis, a ventilation and multiple medications when he arrived at the hospital. Dr. Salia was in an extremely advanced state by the time he arrived for treatment.

In an interview with NBC News, Dr. Salia's 20-year-old son Maada said his father was aware of the risks working in West Africa with Ebola patients. This is what he had to say about his father:

"Even though he knows the sickness is already out, he decided to still go and help his people because he wanted to show that he loves his people. He's really, really, a hero to me."

The Ebola virus is spread through direct contact with bodily fluids, and a person must be symptomatic in order for transmission to happen. Ebola cannot spread through the air.