Richard Ingham and Oliver Thibault
April 12, 2014
Virologists say they are deeply worried by the unprecedented Ebola epidemic in West Africa, which has claimed more than 90 lives and may now also have struck north into the Sahel.
A rare but extremely dangerous virus, Ebola is historically rooted in Central Africa, although it has also caused past outbreaks in Uganda to the east.
Except for a nonfatal case in Cote d’Ivoire in 1994, when a lab researcher was infected while examining a dead chimp, Ebola had not previously been found in the west of the continent.