U.S. scientist warns deadly Ebola virus is already changing to become more contagious.

The deadly Ebola virus could be mutating to become even more contagious, a leading U.S scientist has warned.
The disease has killed nearly 4,000 people, infecting in excess of 8,000 - the majority in the West African nations of Guinea, Sierra Leone and Liberia.
Communities lie in ruins, thousands of children have been orphaned, millions face starvation but the virus continues its unprecedented pace, invading and destroying vast swathes of these countries.
Dr Jahrling explained that his team, who are working in the epicentre of the crisis in the Liberian capital of Monrovia, are seeing that the viral loads in Ebola patients are much higher than they are used to seeing.
He told Vox.com: 'We are using tests now that weren't using in the past, but there seems to be a belief that the virus load is higher in these patients [today] than what we have seen before. If true, that's a very different bug.
'I have a field team in Monrovia. They are running [tests]. They are telling me that viral loads are coming up very quickly and really high, higher than they are used to seeing.
'It may be that the virus burns hotter and quicker.'