Still contagious after negative lft?

[1lifeliveitright]

So my dd tested positive on Friday (last week) after a brief temperature and a bit of a cough that she has had for over a week previously. The whole house has also been ill with varying symptoms but we all tested negative on both lft and pcr.
So out of interest today she did a lft. It was negative. She technically shouldn't be out of isolation until a week today but is she still contagious?
Of course we have no idea if she did actually catch covid before and the pcr picked it up at the later stage or if it was a very new infection. What do others think? BTW I'm not suggesting she should stop isolating, she won't but I'm curious.

LFTs are not intended for people who have had COVID symptoms. A negative LFT does not indicate that she is no longer contagious. It’s really important she does the full isolation period.

LFTs aren't sensitive enough to rule out a covid infection so it could be a false negative

So does a negative pcr mean you're no longer contagious?

LFTs aren't very sensitive, so you can be positive on a PCR while negative on a LFT.

You need a take postive pcr and isolate if postive.
If postive you can stay postive upto 90s days but think you only infectious 10 to 14days.