The World Health Organisation has concluded that it is ethical to give experimental drugs to those fighting Ebola in West Africa.
A panel of ethicists had been debating whether it was right to try the drugs. It also decided that there is a moral duty to evaluate drugs and vaccines in the best possible clinical trials under the circumstances.
Patients who receive experiment drugs must give their informed consent.
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.