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The Ebola epidemic

Kaci Hickox leaves her home in Fort Kent, Maine, to take a bike ride with her boyfriend on Thursday, October 30. Hickox, a nurse, recently returned to the United States from West Africa, where she treated Ebola victims. State authorities want her to avoid public places for 21 days -- the virus' incubation period. But Hickox, who has twice tested negative for Ebola, <a href='http://www.cnn.com/2014/10/30/health/us-ebola/index.html'>has said she will defy efforts</a> to keep her quarantined at home.

Kaci Hickox leaves her home in Fort Kent, Maine, to take a bike ride with her boyfriend on Thursday, October 30. Hickox, a nurse, recently returned to the United States from West Africa, where she treated Ebola victims. State authorities want her to avoid public places for 21 days -- the virus' incubation period. But Hickox, who has twice tested negative for Ebola, has said she will defy efforts to keep her quarantined at home.