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False positives?

13 replies

kirinm · 13/07/2021 11:26

I am looking for some hope really! Our childcare has had a positive lateral flow and is waiting for a PCR. Taking 10 days off work is going to cause major issues so I'm hoping it is a false positive. Does anyone have any experience of positive LFT and then a negative PCR?

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Getupandboogie · 13/07/2021 12:24

Yes, I know if two young children who have had positive LFTs and negative PCRs.

Poppytime · 13/07/2021 12:29

Yes I know of someone who's kid also had positive lateral flow then negative pcr. They were told the lateral flow was a false positive and he just had a cold

TiddleTaddleTat · 13/07/2021 12:30

I think it's fairly unlikely though. Need to repeat tests and perhaps seek further advice.

Lemonmelonsun · 13/07/2021 12:31

Agree it's fairly unlikely, it could be to do with what they ate?
I've been at a huge site in the past doing lat flow and not a single positive.

kirinm · 13/07/2021 12:42

I think I know it's going to be positive just trying to kid myself. Arrrrgh.

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Horst · 13/07/2021 13:07

We had a positive lft followed by a negative pcr.

Followed by negative lft.

LondonJax · 13/07/2021 14:08

I work in a school. We've had about 10 LF tests that have shown positive but the PCR has come back negative 24 hours later. The next LF tests have all been negative.

aleC4 · 13/07/2021 14:19

My dd (14) had a positive lateral flow followed by a negative PCR back in June so it does happen.

kirinm · 13/07/2021 14:44

Thanks for the hope!!

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Sanguinesuzy · 13/07/2021 14:47

On the other hand ds2 had 2 negative lfts (testing as bubble burst). Given all clear to return to school next day. Next day randomly did a test as a bit snuffly/ mild cough and positive...(lft and pcr)

kirinm · 13/07/2021 15:44

I really hope my daughter hasn't caught it as she has literally just got over a horrible virus that saw her hospitalised twice.

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Tupla · 13/07/2021 16:02

False positives are pretty rare. However, false negatives with PCRs are fairly common, so there's a reasonable chance of having a true positive LFT followed by a false negative PCR.

kirinm · 14/07/2021 08:59

She's had another positive lateral flow so I think we know where this is headed 😭

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