What are we missing with testing for the coronavirus disease?
Testing that is currently done on the patients is only focused on verifying if an active patient is infected with the SARS-CoV-2 virus. We are however not testing everyone for the signs of having been previously infected with this virus, which means we are missing the total number of infected population.
According to David, while PCR test, done on the currently sign patients, is time-consuming and expensive, we could be running another form of tests (IGG and IGM) that test for the presence of antibodies in the blood, testing whether someone had at all been infected. It is a much cheaper test that could be done instantly.