> But if blood tests (or in the case of bowel cancer, fecal tests like cologuard) are effective, we can replace more invasive screening options with them. That

> But if blood tests (or in the case of bowel cancer, fecal tests like cologuard) are effective, we can replace more invasive screening options with them. That is not what I'm arguing against. People in this thread are talking about testing earlier and more often because we have these new tests, not "just" replacing existing tests. The math is very unlikely to work out that we should do that.