Ebola Kills 100 In Guinea
The UN World Health Organization (WHO) says the outbreak is one of the most challenging in recent times.
The body says it may take four months to contain the outbreak.
The virus has also killed 10 people in the neighbouring Liberia.
Many West African states have porous borders and people travel frequently between countries.
Southern Guinea is at the epicenter of the outbreak, with the first case being reported in March 2014
WHO says 157 suspected cases had been recorded in Guinea, including 20 in the capital, Conakry.
Sixty-seven of the cases have been confirmed as Ebola
In the neighboring Liberia, 21 cases had been reported, with five confirmed as Ebola.
Mali had reported nine suspected cases, but medical tests done showed that two of them did not have Ebola.
Saudi Arabia has suspended visas for muslim pilgrims from Guinea and Liberia, in a sign of the growing unease about the outbreak.
This is the first known outbreak in Guinea.
Most recent cases have been in the Democratic Republic of Congo and Uganda.
There is no known cure or vaccine for Ebola.
Ebola is spread by close contact and kills between 25% and 90% of its victims.
The tropical virus leads to hemorrhagic fever, causing muscle pain, weakness, vomiting, diarrhoea and, in severe cases, organ failure and unstoppable bleeding.
By Angel Mboya
Source: BBC News