this post was submitted on 31 Oct 2026
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The trick is to find something that uniquely identifies the cancer cells and tell the immune system to attack that. If it says "attack everyone in a red shirt" but some normal liver cells have a red shirt, then you got a problem. But if only the cancer cells are wearing khakis, then you just identify that. It's the same principle as normal vaccines except that for cancers there's no single identifying trait for all people getting the cancer (even if it's the same type). For a virus it has the exact same trait across everyone who catches it until the virus itself mutates (which is why the flu gets a new vaccine each year to fight the most common mutation).