[viraptor]

> So tests without symptoms should not be performed. But that also means you dont find things pre-emptively.

That's not entirely true. It's accepted you get periodic screening for many issues. (breast cancer, pap smear are probably the most common) Then there are tests you can easily request without any symptoms. (STI and allergy tests for example)

> But the MRI radiation gave you cancer

There's no MRI radiation. That's not how it works.

[conanbatt]

A broad generalization, it depends on the test. I was trying merely to make a point that the intuitive model (you want to know if you are sick, you do a test and you get a result) is not how medicine works.

I mixed up CT Scan with MRI, corrected in another comment.