Official: American Ebola patients released from hospital pose "no public health threat"

The two Americans infected with the deadly Ebola virus are now out of the hospital. Doctor Kent Brantly was released from Emory University hospital Thursday morning.

CNN learned Nancy Writebol was discharged Tuesday. Their doctor says they pose "no public health threat," though CNN's Chief Medical Correspondent, Dr. Sanjay Gupta reports a low risk remains that the two Americans could still infect others.