what does a negative/positive test result mean?

Lab test results may be positive, negative, or inconclusive. Your doctor will discuss what your test results mean for you and your health.

A positive test result means that the substance or condition being tested for was found. Positive test results also can mean that the amount of a substance being tested for is higher or lower than normal.

A negative test result means that the substance or condition being tested for was not found.

Negative results can also mean that the substance being tested for was present in a normal amount.

Inconclusive test results are those that are not clearly positive or negative.

For example, some tests measure the level of antibodies to some bacteria or viruses in blood or other bodily fluid to look for an infection. It is not always clear if the level of antibodies is high enough to indicate an infection.

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For what?