There are two possible scenarios: If you receive your test 5-7 days after a known exposure; YES, you most likely have an active infection. Your medical provider is the best source for an accurate diagnosis. Talk to your provider for more specific information. -or- If you are re-testing or it is 10 days past symptom onset, a positive PCR test at this time could be due to the remnant RNA in your system. In this case you would not be considered contagious. This type of assessment requires a medical evaluation by your provider. Talk to your provider for more specific information.