Please select another video.
Immunotherapy offers hope for some cancer patients
Immune therapy drugs work by coaxing white blood cells that usually fight bacteria and viruses to kill cancer cells. For now, the drugs usually work in only about 20 to 40 percent of patients and doctors can't yet predict which ones. NBC’s Robert Bazell reports.
Full Episodes of Nightly News
Watch full episodes of NBC’s Nightly News with Lester Holt.
Keeping you Healthy
Stay up-to-date on the latest health and medical news.
Watch our intimate, first-person documentary shorts about people, places and stories you may not have otherwise discovered.