Lateral flow after positive PCR

[SanFranBear]

DD tested positive 12 days ago and so has completed her 10 days of isolation with her symptoms disappearing after a couple of days.

She's due to go to her Dad's tomorrow and he's asking her to do an LFT beforehand as his DM is vulnerable. My concern is that you're not recommended to take another PCR for 90 days after a positive result as it can show false positives but its not clear if you can take an LFT?

DD has returned to school without needing to do this which is wonderful as she definitely needed the social aspect and, I do believe, is well again. However, what if she shows as positive on the LFT? Or does it 'test' in a different way?

Sorry - I've tried to find guidance but not having much luck?

She doesn’t need to do a LFT and there is definitely a risk of a false positive. The pcr false positive risk is higher but my children have been told by school not to do LFTs for 90 days.

I don't think you'll find any guidance as such, everyone knows you shouldn't be testing within 90 days of a positive test. There won't be guidance for people making up their own rules

Her dad clearly doesnt understand testing but what can you do?

Just tell him no as she isn't supposes to retest for 90 days if she doesn't have symptoms (on LFT or PCR). She has completed her isolation and is considered ok to mix with others now

My DD had a negative LFT a week after her positive PCR (triggered by a positive LFT and mild symptoms).

I was advised by test and trace that you may continue to test positive certainly on PCR for up to 90 days post infection but OK to not be in isolation as long as temp was normal. Only other issue she said was that if you get a positive PCR and then develop covid symptoms (ie new cough, temp or loss of sense of smell), the 10 day count is then from the date of the first symptom not the PCR.

There's no point her doing another test for 90 days. If he has concerns about his DM then he could not see DM for 10 days? I mean DD has done her 10 days bit if he felt more comfortable could she wait another week?

If she's done her 10 days isolation it shouldn't matter. She could test positive for the next 90 days, is he not going to see her in that time? He needs to do a bit of reading I think lol

I was advised to do another LFT today by T&T as I am still sneezing. I tested negative so they are happy with that. However, we obviously can’t do PCRs for 90 days as they test in a different way.
However, the negative isn’t guaranteed at this point.

Just tell him she tested negative. If he wants her tested let him book her in, and then get told she can't have the test.
Surely DM can just stay away this weekend so your daughter doesn't come into contact with her if he wants to go to that level

Thank you all so much - Dr Google isn't very clear as it definitely says not to do anymore PCR or lab tests (she's part of the saliva testing trials) but I didn't think to ask the Test & Trace people about lateral flows.

I do wonder how this will work with me returning to my office as we have to show proof of a negative LFT on arrival. I have sadly also gone down with it - mildly at least - but there's been no guidance around returning if you've had a positive PCR and have completed your isolation. One for my manager, I think

T&T told us we shouldn’t do either a PCR or lateral flow for 90 days after our positive PCR tests, because it could still show as positive from that infection.