South Korea did extensive testing when they successfully eradicated the virus. As user rramach points out, Ioannidis cherry picks the data in many ways, includi

South Korea did extensive testing when they successfully eradicated the virus. As user rramach points out, Ioannidis cherry picks the data in many ways, including ignoring the extensive data of South Korea. Not did was Koreans' testing program extensively documented (by Korean scientific institutions, The Western press, and etc), we know they found most or the larger portion of cases because they were able to bring new infections and deaths down to zero. (e.g. require n95 masks in public, keeping the elderly at home, offer voluntary isolated infection to low-risk individuals to increase herd immunity, etc) These "get the economy going" measures are totally nuts. You know 10-20% of even fairly healthy people get pneumonia and require hospitalization for virus. Most young people survive but many of those surviving suffer permanent lung damage. Further, people between 50 and 65 make a huge contribution to the economy and taking them out for an extended period would be highly costly like all this is highly costly (but quarantine should eliminate the virus so could be even quick). Just much, quarantining just some people would require moving a vast number of people from place. IE, what happen with young people living with old people (as happens a lot). The movement of people from place to place would naturally ... spread the virus extensively. More over, where do you get the extra places for either the young living or the old leaving? The UK talked about plans, true but abandoned quickly when infection began because they are obviously impractical fantasies. Quarantining everyone is extremely simple and just requires doing what South Korea did but on a large scale.