If cancer can spread so easily throughout your body, why can’t it spread from person to person? Aka why isn’t it contagious?
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cancer cells are malfunctioning cells, rather than pathogen bacteria or viruses that are built to infect and spread. Cancer cells are reliant on nutrients from your blood and largely rely on your bloodstream to move at all. They would not likely survive for very long exposed to the elements with no food or way to protect themselves.
in order to even get into the body of another person it would likely need a transplant of some sort, and even then it would likely be destroyed by the new host’s immune system immediately, much like how the immune system usually tries to destroy healthy transplanted organs.
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