Third top doctor dies from ebola

A third top doctor has died from ebola in Sierra Leone, a government official said, as health workers tried to determine how a fourth scientist also contracted the disease before being evacuated to Europe.

The announcements raised worries about the country’s fight against ebola, which has killed more than 1,400 people across West Africa.

The World Health Organisation said it was sending a team to investigate how the epidemiologist now undergoing treatment in Germany may have contracted the disease that kills more than half its victims.