I had a test at 5 1/2 weeks after my possible low risk exposure. I took at 20 min. rapid test. The person at the clinic told me the test are very sensitive, and would pick up anti bodies within 4-5 weeks at most. It would be a very rare occurance for it to happen past 6 weeks. She did tell me that the CDC still does say 13 weeks, so they stick by that in order to maintain consistancy, which makes complete sense. Does this make sense?