[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?