When are you infectious?

[DoleWhipFloat]

Not me, but when would a person be infectious:

Thursday - neg PCR
Friday - neg LFT
Saturday- neg LFT

Saturday afternoon - develops slight cough. Goes for PCR. LFT appears faintly positive.

Sunday - confirmed positive by PCR. Symptoms are fully developed.

Thanks

They were testing daily due to their child having covid.

Test and trace were working on the assumption of two days before symptoms, but I don’t think anyone can say definitively. Lots of people haven’t passed it on. Some people have tested negative on lateral flow then passed it on later that day.

Supposed to be from a couple of days before symptoms. LFTs aren't as sensitive as PCRs so may not pick it up as early

Two days before symptoms start and for the first 2-3 days once they start, apparently