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"Secret Serum" in the United States can stop an outbreak of Ebola?

August 9th, 2014 at 01:55 clock Updated BST

On Friday, the World Health Organization (WHO) declared the outbreak of Ebola in West Africa an "international emergency".

In the United States, two Americans who have been infected with the virus, treated with a secret serum and included in the recovery, in Atlanta.

Whey is controversial because it has not been tested in humans before - and that is not given to others in Africa who are suffering from the virus.

Alastair Leithead went to San Diego, where he developed and met with researchers looking for a cure serum.