The family of missionary Nancy Writebol say she has a fighting chance to survive Ebola. She just arrived in Atlanta from Liberia.  Last week Writebol's family was preparing for her funeral. Chief Medical Correspondent Dr. Sanjay Gupta discusses the serum that could help save her life. Bruce Johnson is the president of the Christian missionary … Continue reading Can enough serum be produced to make a major difference in the battle against Ebola?