The following submission statement was provided by /u/globehater:

Submission Statement: "More testing" is not always the best answer to cancer prevention. Although new MCED (Multi-Cancer Early Detection) blood tests promise to be able cleverly find trace evidence of tumor DNA in the blood, confirming the test results is going to require even more costly follow-up tests. And survival rates might not actually be improved by knowing earlier about tumors that prove to be benign.

How can we make sure this technology leads to longer lives?

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/yiomdj/a_blood_test_that_screens_for_multiple_cancers_at/iujo1nd/