NITA BHALLA GUINEA and the Democratic Republic of Congo are racing to contain fresh outbreaks of Ebola that have killed at least four people, amid fears the virus could spread across the region. It is the first time Ebola has been detected in West Africa since the world's worst outbreak in 2013-2016, which killed 11,300 people, mostly in Guinea, Sierra Leone and Liberia. The world's second-deadliest outbreak was declared over last year in Congo, which has also witnessed a resurgence this month. The World Health Organization has warned that the latest cases pose a risk to other African nations and…