Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

pkg cohen cancer study_00012730.jpg
pkg cohen cancer study_00012730.jpg

    JUST WATCHED

    New treatment attacks cancer cells

MUST WATCH

New treatment attacks cancer cells

University of Pennsylvania researchers "train" the immune system to attack cancer cells. CNN's Elizabeth Cohen reports.

New treatment attacks cancer cells

University of Pennsylvania researchers "train" the immune system to attack cancer cells. CNN's Elizabeth Cohen reports.