re the LF tests ,as said above I think it's the swabbing that can be the problem as done correctly it's pretty unpleasant .
I posted this above and can see that accuracy declines when carried out by lay people but I'm not able to understand if the figures show a concerning decrease or just a negligible one .Can anyone help ?
Phase 4 evaluation
A further series of individuals were recruited from consecutive cases from COVID19 Testing centres with tests performed by self-trained individuals and the results were compared to the Phase 3b shown above. Performance was optimal when the LFD was used by laboratory scientists (156/197 LFDs positive [79.2%, 95% CI: 72.8-84.6%])] versus trained healthcare-workers (92/126 LFDs positive [73.0%, 95% CI: 64.3 80.5%]) and self-trained members of the public given a protocol (214/372 LFDs positive [57.5%, 95 CI:52.362.6%];p