COVID-19 Instant Screening test, page-567

It is a part of the answer only rather than the whole answer.

This partial answer still applies to 100's of millions of people around the world - the huge scale of a low cost instant answer is what you should be thinking about. Also think about the huge amount of current testing waste products that can be dramatically reduced - our aged care centres alone have had to get shipping containers in just to handle the testing waste from current approaches.