The doctor who treated the first Ebola victim in Nigeria has contracted the deadly disease, authorities have confirmed.
Nigerian health minister Onyebuchi Chukwu said three others who also treated Liberian-American victim Patrick Sawyer, who died on July 25 days after arriving in Nigeria from Liberia, are now showing symptoms.
Their tests results are pending, he added.
As it reaches seven months since the Ebola outbreak started we take a look at the timeline of events leading up to the spread of the virus.
More than 100 British personnel are arriving in Sierra Leone to combat the Ebola outbreak in West Africa. Here's what else the UK is doing.
A man has been filmed helping an Ebola patient onto a plane without wearing any protective equipment.