[snagglegaggle]

But if the tests are cheap enough you can repeat them and compare. Bringing cost of blood diagnostics down is I think a good idea. I have fitness and health conscious friends who regularly get direct-to-consumer tests as a matter of course. In a few cases they have caught issues very early.

This is understanding there are some false positives, but being able to recognize them and learn to ignore them is better than not testing out of fear you overreact.

[sandworm101]

Repeating a test doesnt help. The blood result likely wont be different the second time. A false negative is a person for whome the test just doesnt work, no matter how many times you repeat it. (In reality, these sorts of important tests are run multiple times against the single sample before they print the results.)

[snagglegaggle]

For a simple false negative it would. That is a special false negative, at least to me. Is that occurrence common, and do you have an example?