Can you transfer cancer to someone without cancer by injecting yourself with a cancerouse cell? iv always been curiouse.

No: Cancer is not transmissible in humans. There are no known cases of cancer being passed from person-to-person via blood transfusions or needle stick. The immune system of the recipient will kill the foreign cancer cells. However, a cancer-causing virus could be transferred that may cause cancer years later. Interestingly there is a facial tumor in tasmanian devils that spreads between animals.