In the article Ioannidis says: "The most valuable piece of information for answering those questions would be to know the current prevalence of the infection i

In the article Ioannidis says: "The most valuable piece of information for answering those questions would be to know the current prevalence of the infection in a random sample of a population and to repeat this exercise at regular time intervals to estimate the incidence of new infections. Sadly, that’s information we don’t have." How does he know that this is not happening? It's been published for Sweden that they now moved to use "Sentinel tests" to track the spread of the virus (https://www.thelocal.se/20200320/fact-check-has-sweden-stopped-testing-people-for-the-coronavirus https://www.thelocal.se/20200320/fact-check-has-sweden-stopp...). This might explain the reason why the Swedish government is still quite relaxed. However, I would be very surprised if other governments would not be doing the same. Maybe this is the reason why governments really increased the response, because they are acting on this data. [edit typo]