More cancer patients are turning to immunotherapy, despite a lack of supporting evidence. Immunotherapy boosts the immune system or helps the immune system to find cancer and attack it.
CORRECTION: An earlier headline on this video referred to a lack of evidence for immunotherapy in treating cancer. In fact, there is evidence immunotherapy works for some cancers.
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The National is CBC Television's flagship news program. Airing six days a week, the show delivers news, feature documentaries and analysis from some of Canada's leading journalists.
