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.