American Ebola Survivor Dr. Rick Sacra Returning to Africa

Dr. Rick Sacra to return to Ebola outbreak in Liberia.

He is set to depart on Jan. 15, and will work at the ELWA hospital with the aid group SIM USA.

"I guess I'm less nervous about this trip because I know what I'm getting into a little more," Sacra said at a news conference this morning at the University of Massachusetts Medical School. "The thing I was afraid of last time, I've had it, and I'm through it. Thank God."

"Doctors say I'm immune, but I don't plan to test that," Sacra said.