A year ago, there was no evidence that lockdowns would protect older high-risk people from Covid-19. Now there is evidence. They did not.
With so many Covid-19 deaths, it is obvious that lockdown strategies failed to protect the old. Holding the naïve belief that shutting down society would protect everyone, governments and scientists rejected basic focused protection measures for the elderly. While anyone can get infected, there is more than a thousand-fold difference in the risk of death between the old and the young. The failure to exploit this fact about the virus led to the biggest public health fiasco in history.
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