Health officials say a Massachusetts doctor who is back in the hospital this weekend after being successfully treated for Ebola last month does not have the virus.

UMass Memorial Medical Center says test results for Dr. Rick Sacra came back negative for Ebola. And the federal Centers for Disease Control and Prevention has confirmed that Sacra's symptoms are not due to the virus.

Sacra was admitted to the hospital in Worcester on Saturday with a cough and low-grade fever. He was admitted for observation, while the CDC conducted the tests.

The hospital said Sunday that Sacra would be removed from isolation and would continue to receive routine care for a respiratory infection.

An American photojournalist who contracted the deadly Ebola virus while working in West Africa has begun his journey home for treatment.

Ashoka Mukpo will be the second Ebola patient to be treated at the Nebraska Medical Center's specialized isolation unit. Hospital officials said they expected an Ebola patient to arrive Monday, but they declined to provide a name.

The 33-year-old Mukpo was working as a freelance cameraman for NBC in Liberia last week when he became ill. NBC reported Sunday that Mukpo is en route to Nebraska for treatment. Mukpo's family in Providence, Rhode Island, said Friday he is going to Omaha.

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