Artist Stephen Doe paints an educational mural to inform people about the symptoms of Ebola in Monrovia, the capital city of Liberia. The photo was taken Sept. 8. (Ahmed Jallanzo/European Pressphoto Agency)

The deadliest Ebola outbreak in history keeps getting worse.

The combined death toll in Guinea, Liberia, Sierra Leone and Nigeria spiked to 2,296 over the weekend -- and the situation in Liberia is spiraling out of control, with the number of Ebola cases there "increasing exponentially," according to the World Health Organization.

There are dire, if unreliable, predictions that the number of total Ebola cases could reach 100,000 (the WHO has said that "the aggregate case load" of victims "could exceed 20,000"). And now, Oxford researchers are predicting that 15 more countries are at risk of Ebola exposure.

Photos documenting the terrible toll and dangers of Ebola -- of the dying and the dead, of doctors and missionary workers and others in head-to-toe protective suits -- have become ubiquitous as the West African outbreak has turned into a full-fledged epidemic and a crisis of global proportions.

Less visible internationally: The different ways officials throughout West Africa (and beyond) are warning the public about the deadly Ebola virus disease and telling people how to avoid becoming infected by it. The warnings are being conveyed through signs, billboards, flyers and even hand-painted murals.

Stephen Doe's paintwork is part of a Liberian program to inform people about the deadly effects of Ebola, which has infected and killed more people in Liberia than in any other country. Taken Sept. 8. (Dominique Faget/AFP/Getty Images)

The mural spotlights Ebola's symptoms. (Dominique Faget/AFP/Getty Images)

A woman in Ivory Coast's largest city, Abidjan, discards waste water beneath an Ebola awareness billboard reading: "The risk of Ebola is still there. Let us apply the protective measures together." The photo was taken Aug. 25. (Legnan Koula/European Pressphoto Agency)

A man stands at a stall next to a billboard in Conakry, Guinea. The sign reads: "You suspect Ebola? Quick treatment at the hospital raises your chances of surviving it." Taken Sept. 8. (Cellou Binani/AFP/Getty Images)

A billboard displayed near the John F. Kennedy Medical Center in Monrovia, Liberia, warns people to avoid hunting, preparing and eating bush meat, which is considered life-sustaining protein where nutrition is scarce . Taken Aug. 19. (Zoom Dosso/AFP/Getty Images)

Another billboard near the John F. Kennedy Medical Center in Monrovia, Liberia. Taken Aug. 19. (Zoom Dosso/AFP/Getty Images)

A player heads a soccer ball near an Ebola poster in the Ivory Coast port city of Abidjan. Taken Sept. 6. (Thierry Gouegnon/Reuters)

A soldier from the Sierra Leone army stands near a poster outside Kailahun. Taken Aug. 14. (Carl de Souza/AFP/Getty Images)

"Stay Ebola Free" says this billboard, which promotes hand-washing in Monrovia, Liberia. Taken Aug. 9. (Jonathan Paye-Layleh/Associated Press)

A worker holds a flyer at Murtala Muhammed International Airport in Lagos, Nigeria. Taken Aug. 11. (Pius Utomi Ekpei/AFP/Getty Images)

Filipino workers walk past a "signs and symptoms" flyer posted in Manila. Thousands of Filipinos working in West Africa have been evacuated because of the Ebola virus outbreak. Taken Aug. 20. (Ritchie B. Tongo/European Pressphoto Agency)

A mother and child walk past a poster at Lungi International Airport in Sierra Leone. Taken Aug. 12. (Carl de Souza/AFP/Getty Images)

Liberian president Ellen Johnson-Sirleaf (right) walks past an Ebola sensitization poster in downtown Monrovia. Taken July 26. (Ahmed Jallanzo/European Pressphoto Agency)