The presence of two red bars in the kit result indicates a positive test; if there is only one red bar it is negative; if no red bar appears, the test has failed. 1. Two red bars: If two red bars appear on the test strip as a result of using the kit, the test result is positive. The test result is positive. For example, the new coronavirus antigen kit, the test results are positive, you can initially judge the probability of infection with the new coronavirus is very high; if the early pregnancy test paper test is positive, the probability of pregnancy is very high. 2. A red bar: the test results of the kit only appear a red bar, indicating that the test results are negative; the virus test kit is negative, indicating that there is no infection of the virus; if it is a negative test of early pregnancy test paper, it can be diagnosed that there is no pregnancy. 3. No red bar: If the test result does not show a red bar, it means that the test has failed and needs to be re-tested. If you feel unwell, you should go to the hospital in time for treatment under the guidance of a physician.