RE: How thick can scientists get ?29 Nov 2021 09:20
Do you not think there is a role for both PCR and LFT? LFT can be used (for example) for screening in schools or for NHS staff, with positive tests followed up with PCR - especially where/when strain identification is an objective.
Remember that an LFT gives a positive result in minutes, which facilitates immediate action (I won't go to school / work today...) whereas PCR typically requires 24-48hrs even with the scale testing labs that have been built.
Despite your apparent perception of their inaccuracy, if you test positive on an LFT, the overwhelming likelihood is that you have COVID. Upwards of 96% of people testing positive on LFTs at the moment will be true positives. This is largely because LFTs are very “specific” – they don’t give many false positives. The UK Health Security Agency estimates that for every 10,000 LFTs taken by genuinely COVID-negative people, there will be fewer than three false positives (a specificity of 99.97%).
Better LFT's are becoming available. Perhaps a combination of these together with PCR will work best?
What do you think...?