###Human: Are Elisa, RNA PCR and Tri-Dot sufficient to rule out HIV? ###Assistant: Hello. Guidelines says that you should repeat the test after 12 weeks of exposure, but because you have undergone test many times, you are almost sure that you do not have HIV. But it is better to repeat once after 12 weeks. You need not be anxious as most likely it turns to be negative as there is no hint of any symptoms and on previous test results.