I've already had Covid twice (I work in a school🙄) so I am quite familiar with the symptoms. I'm pretty sure I have it now for a third time, but am getting very mixed results with autotests. I have 4 different brands in stock (in France, they were giving them away to school staff before the summer, but different brands in different pharmacies). Over the last 36 hours I have done 5 tests, 4 different brands. 3 tests have been negative, two have given a very very faint positive (one yesterday morning, one this morning). I'm not imagining the line - both my sons and DH confirmed it was there!
I know from experience that these faint lines turn stronger as I get more sick. But at this point I am unlikely to get a positive test from a pharmacy test, so I'm waiting until tomorrow to do that.
But my question is: is it normal for autotests to have different sensitivities? For me, two brands were a clear negative and the other two were a faint positive.