Prime Minister David Cameron has said his "thoughts and prayers" are with British nurse Pauline Cafferkey, after doctors revealed today that her condition had worsened.
Cameron sent his message of support to the healthcare worker via Twitter.
My thoughts and prayers are with nurse Pauline Cafferkey who is in a critical condition with Ebola.
Colleagues of a British nurse who contracted Ebola in Sierra Leone tell ITV News about why they have stayed on the frontline of the disease.
As it reaches nine months since the Ebola outbreak started we take a look at the timeline of events leading up to the spread of the virus.