Within a few seconds after loading the test the ''control'' line appeared. The control line that appears on a rapid COVID test '''does not''' indicate that one has correctly taken a sample, it '''only indicates that one loaded the test correctly.''' | Within a few seconds after loading the test the ''control'' line appeared. The control line that appears on a rapid COVID test '''does not''' indicate that one has correctly taken a sample, it '''only indicates that one loaded the test correctly.''' |