people infected with ebola virus
This is not the first case that doctors returning from the Ebola epidemic are tested to be free from the virus.
UK researchers have developed a simple set of testing tools to detect people suspected of being infected with the Ebola virus.
Two Americans who have been infected with Liberia's Ebola virus have been declared to have been successfully treated and there is no deadly pathogen in the body.
People with HIV can live for many years if they are given medication, but any case of contact with an infected person is almost like a death sentence.