Health officials say the West African Ebola outbreak has virtually stopped in Guinea but continues to rage in neighboring Liberia and Sierra Leone.
In its latest update, released Friday, the World Health Organization says Liberia reports 11 new cases and four deaths from the disease, while Sierra Leone reports 32 new cases and 15 deaths.
Deadliest Ebola Outbreaks
In contrast, Guinea has seen only one new Ebola case in the past seven days. Two people died this week from earlier cases.
The death toll from the six-month outbreak stands at 539.
There is no effective treatment for Ebola. Regional authorities have moved to halt the spread by isolating patients and urging people to avoid direct contact with those infected by the Ebola virus.
Ebola figures from Guinea, Sierra Leone and Liberia
On Twitter Friday, the WHO said current high risk groups include mourners who touch bodies as part of burial ceremonies, hunters in the rain forest, health workers, and family members and others who have close contact with infected people.
It says the current epicenters of the outbreak are the Kaliahun and Kenema areas of Sierra Leone, and Lofa and Monteserrado counties in Liberia.