Someone on TV recently showed a lft test which he said showed he was posative. The line pointed to C not T. I wonder if anyone else like my wife thinks C means covid (c is for control ).I can see it is confusing
There's a control check to make sure you put something in. Presume it's to stop you putting nothing in or putting water in. Altho someone on here said someone put water in to fool it to get a negative so am not certain