RE: PCR and Dead Virus5 Sep 2020 11:04
QuickDraw, the govt appear to now have a laser focus on breaking transmission chains. They’re interested in identifying people during the period that their viral loads are highest. The Beeb article is highlighting something that Michael Mina has been highlighting, that PCR tests are too sensitive. They pick up people way beyond the time when they’re infectious which is equivalent to a false positive for infectivity - despite being true positive for having Covid.
If this thinking is firmed up, then LFDs will be equivalent to PCR testing in terms of sensitivity. I was slightly puzzled by Sir Al’s change in language in the recent RNS, but I’m absolutely convinced that it was based on aligning with that govt document. If we expect to be equivalent to PCR for sensitivity then it comes down to specificity and Sir Al was very specific in highlighting the very specific nature of affimers. I’m sure this is another hurdle that will be easily overcome.
It’s unfortunate that you’ve had to mention CS, he’s clearly an irritating twat. I posted the article here as it’s a huge positive for Awacta and LFDs, I genuinely couldn’t care about the impact on NCYT as I’m not invested there, but I wish you well. My view is that PCR will continue to be needed, it offers additional capacity if nothing else. The results of the clinical validation will be very interesting, especially how they’re presented for sensitivity given the change in govt thinking. Specificity and the false positive rate looks now to be the key number, which will impact the demand for PCR.