glammanana
My friend phoned me last night after arriving back from Portugal for a weeks holiday,everyone on the flight had negative tests done prior to returning to UK and she received a text from T&T that someone on the flight had tested positive on return how on earth can that happen if all the passengers tested negative on boarding the plane ? she now has to isolate for 10 days as does her partner.
It depends which tests they had initially. LFTs and PCR tests work in different ways. LFTs work best for people, sometimes asymptomatic, at the beginning of infection. If the people tested were already beyond that stage, it's entirely possible that a LFT would have been negative. PCR tests won't be positive if they are done at the very beginning of infection.