I had a rapid test for antigen plug up to 2x because the first one said the results were invalid, but how shocked I was when the second plug in the nose was just finished for a few seconds I was called to take a negative certificate, I asked how fast it was, he said it was fast, I was curious to see invalid test results, he said had been discarded, a little arguing, he said the important thing was negative results. Disappointed and I stayed.