The man from central Binh Thuan province arrived at Tan Son Nhat international airport in the city on Feb. 11 with Ebola symptoms, including high fever and dry cough, online newspaper VnExpress reported.
He was transferred to the Ho Chi Minh City Tropical Diseases for quarantine and observation.
The man worked as a photographer in Sierra Leone.
The man was being treated as a tuberculosis patient. Earlier, doctors in Sierra Leone had diagnosed his illness as pneumonia.
A death from Ebola was confirmed in Sierra Leone on Jan. 15, hours after the World Health Organization declared an end to the deadly virus in West Africa.