This very detailed study, out of China, tacitly (and unsurprisingly) endorses the long lockdown in Wuhan. Nevertheless, its findings are essential to the argument that all the business shutdowns, school closures and masking by healthy people have no scientific basis whatsoever.
In summary, the detection rate of asymptomatic positive cases in the post-lockdown Wuhan was very low (0.303/10,000), and there was no evidence that the identified asymptomatic positive cases were infectious. These findings enabled decision makers to adjust prevention and control strategies in the post-lockdown period. Further studies are required to fully evaluate the impacts and cost-effectiveness of the citywide screening of SARS-CoV-2 infections on population’s health, health behaviours, economy, and society.
Study link:
https://www.nature.com/articles/s41467-020-19802-w