RE: Avacta RNS this am15 May 2020 08:59
Yes, my background is 20 years in the diagnostics space, I have been involved with both molecular test development and antibody / antigen ELISA based test development, I have even looked at aptamers so it puts be in a position to comment.
qPCR is the gold standard, and Genedrive will provide gold-standard results based on tried and tested technology. It is the gold standard because the process 'amplifies' the target buy making copies of it when the target it present. It is uniquely efficient and although many others have tried to make alternatives (e.g. isothermal amplification) none match the elegance and efficiency of PCR. As a sign of this look at Abbotts isothermal COVID test, released to a fanfare but now showing it isn't sensitive enough and missing lots of low positives.
Avacta and affirmers. I start by saying I have no direct experience of these. But from the papers I have read I see no reason to believe that these will be more sensitive than aptamers or antigen based tests. What that means is I do not believe they will have the sensitivity. Most papers are quoting 60%-80% sensitivity in a clinical setting which isn't good enough.
Why these companies think that what didn't work before will suddenly work now I can't fathom. I put Abbott in that category too, their influenza test based on the same isothermal technology wasn't sensitive enough too.
I may well have missed something that's not in the public domain that has made a breakthrough since the publications on affirmers. My experience says not, but I am happy to be proven wrong.
All my opinion but based on my experience in this field...