Things appear to be going from worse to worst as the deadly Ebola epidemic surges on. The CDC has issued a Level 3 - Avoid All Non-Essential Travel - warning.

CDC urges all US residents to avoid nonessential travel to Liberia, Guinea, and Sierra Leone because of an unprecedented outbreak of Ebola.

An outbreak of Ebola has been ongoing in Liberia since March 2014.

This outbreak also affects Sierra Leone and Guinea; to date more than 1320 cases have occurred in the three countries and more than 725 people have died, making this the largest outbreak of Ebola in history.

At least three Americans have been infected; two are health care workers in an Ebola clinic. Affected districts include Bomi, Bong, Grand Gedeh, Lofa, Montserrado (including the capital city of Monrovia), Margibi, and Nimba.

Instances of civil unrest and violence against aid workers have been reported in West Africa as a result of the outbreak.

The public health infrastructure is being severely strained as the outbreak grows.

CDC to send additional 50 experts to region in next 30 days.

Dr. Thomas Frieden, director of the Centers for Disease Control and Prevention, said Thursday that even in a best-case scenario, it could easily take three to six months to stem the epidemic in West Africa.

