In this Oct. 16, 2014 file photo, Centers for Disease Control and Prevention (CDC) Director Dr. Tom Frieden listens as he testifies on Capitol Hill in Washington. Health workers on the front-line of the Ebola crisis say the need for urgent help isn't letting up, as Congress begins considering the $6.2 billion emergency aid request.

Health officials urge Congress for Ebola help

Even with increasing global attention to the epidemic, it takes time to train new health workers, build field hospitals, and buy protective …