Rapid coronavirus tests: a guide for the perplexed
▻https://www.nature.com/articles/d41586-021-00332-4
David Harris, a stem-cell researcher in charge of Arizona’s mass testing programme, says the different types of test have different uses: rapid antigen tests shouldn’t be used to assess the prevalence of a virus in a population, he notes. “If you use it like a PCR, you get a terrible sensitivity,” he says. “But in terms of what we’re trying to do — preventing the spread of infection — the antigen test, particularly when it’s applied multiple times, seems to work great.”
https://media.nature.com/lw800/magazine-assets/d41586-021-00332-4/d41586-021-00332-4_18844370.png#.jpg 
https://media.nature.com/lw800/magazine-assets/d41586-021-00332-4/d41586-021-00332-4_18844372.png#.jpg 
https://media.nature.com/lw800/magazine-assets/d41586-021-00332-4/d41586-021-00332-4_18844374.png#.jpg