What does 'reactive' mean in my blood test result?

Results for HIV, syphilis, hepatitis B and hepatitis C sometimes say 'reactive'. What exactly does that mean? At ZIZ we use rapid tests so that you know where you stand quickly. These tests are very sensitive. If the result is negative, you can assume that you do not have the infection. 

But because the tests are so sensitive, the test sometimes reacts when there is nothing wrong. This happens in about 1 in 100 tests. We then immediately run an extra test to check the result. The only thing you notice is that the result sometimes takes a little longer.

If the second test is also positive, the diagnosis is certain. If it is negative, there is still a very small chance (<0.01%) that HIV, syphilis or hepatitis is present after all. Because these are serious diagnoses, we then run one more test. This result can take up to 2–3 working days. During this process, your result shows as 'reactive' in the portal. Do you have any questions about this? Call ZIZ on 085 800 0742 and ask to speak to the nurse