Is cancer contagious?
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There is no evidence that close contact (including kissing, touching, having sex, sharing meals or breathing the same air) with someone who has cancer can give you cancer. A person's cancer cells would not usually survive in the body of another healthy person because their immune system would destroy the foreign cancer cells.
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Although cancer is not contagious, certain bacteria and viruses that can increase the risk of cancer are contagious. These bacteria and viruses can be passed between people through kissing, touching, having sex or sharing meals.
The Canadian Cancer Society is committed to sharing important information about cancer risk to Canadians and will continue to monitor research in this area.