Ebola has killed more than 3,000 people in Guinea, Liberia and Sierra Leone, and the United Nations says those numbers are vastly under-reported.
Take a look at images of the ravaged West African region.
The largest recorded Ebola outbreak in history has led the U.S. Peace Corps to evacuate hundreds of volunteers from three affected West African countries, according to a State Department official.
Ministers in West African states say they lack the resources to battle the world's worst outbreak of Ebola and deep cultural suspicions about the disease remain a big obstacle to halting its spread.
Bushmeat - from bats to antelopes, squirrels, porcupines and monkeys - has long held pride of place on family menus in West and Central Africa, whether stewed, smoked or roasted. Experts who have studied the Ebola virus from its discovery in 1976 in Democratic Republic of Congo, then Zaire, say its suspected origin - what they call the reservoir host - is forest bats.
There is no cure for the virus and no vaccine, but care from medical workers so far has helped sustain the lives of nearly half of those stricken.
Health workers are working tirelessly to obtain blood samples for Ebola virus testing in screening tents in Kenema, Sierra Leone, among other places.
Two U.S.-based missionary groups have ordered the evacuation of their non-essential personnel from Liberia after a doctor and a missionary both contracted Ebola.
Patients are quarantined to isolation blocks in hospitals, like this one in Macenta, Guinea. The Ebola virus is suspected of killing at least 60 people from rural Guinea to the capital Conakry.
Medical staff working with Medecins sans Frontieres (MSF) bring food to patients kept in an isolation area at the MSF Ebola treatment centre in Kailahun, Sierra Leone. The country now has the highest number of Ebola cases, surpassing neighboring Guinea where the outbreak originated in February.
Abdulsalami Nasidi, director of the Nigeria Centre for Disease Control (NCDC), Lagos state health commissioner Jide Idris and Lagos Special Advisor on Health Yewande Adesina, spoke about the update on the Ebola outbreak during a news conference in Lagos on July 28. The Nigerian city of Lagos recently shut down and quarantined a hospital where a man died of Ebola in the first recorded case of the highly infectious disease in Africa's most populous country.
To learn more about the Ebola virus itself, click here.