Can enough serum be produced to make a major difference in the battle against Ebola?

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 group that Nancy Writebol is affiliated with. He told Anderson how her family has been handling her illness.