Up to 45% of people infected with SARS-CoV-2 can have no symptoms, or very subtle symptoms. This test is highly sensitive for the presence of the SARS-CoV-2 virus, and the chances of receiving a “false positive” result - a result that is positive but should have been negative - are approximately 1%. So, if you receive a positive result, the chances that you had the virus at the time of the test are 99%, and even if you don’t have symptoms, you should treat yourself as infected.