A British military health worker who became infected with Ebola while in Sierra Leone has been declared free of the virus.

Anna Cross (25) was admitted to the Royal Free Hospital on March 12th, and was the first Ebola patient in the world to be given the experimental drug MIL 77.

Speaking at a press conference in London after she was discharged from hospital, Corporal Cross thanked the medical team who looked after her.

"They are an absolutely incredible bunch of clinicians; incredibly skilled, incredibly intelligent," she said. "Thanks to them, I am alive."

Ms Cross had been working at a British built Ebola crisis centre in Kerry Town, southwest of the capital Freetown when she was diagnosed with Ebola.

Describing the moment she found out she had the disease, Ms Cross said: "I was diagnosed by one of the military doctors out there. They did a blood test on me, then they came and told me personally."

"It was somebody that I knew really well, and I knew they were gutted to tell me."

Ms Cross said she had no immediate plans to return to Sierra Leone, but that she was planning to joining the military again.

"I would love to go back and do things with the military but I have to do a lot of physical work, it is going to take me a long time," she said.

British nurses Pauline Cafferkey and Will Pooley both survived the disease, after being treated in the UK.

They also contracted the highly-contagious disease while treating sufferers in Sierra Leone.

The outbreak has killed more than 9,500 people in West Africa.