Goodhart’s law and the dark side of herd immunity

Herd immunity is often held up as a solution to the COVID-19 crisis. Bob Hancké (LSE) argues that it is a dangerous solution, and morally rejectable – in large part because it is a special instance of Goodhart’s law, undermining the very goal it purports to achieve. Herd immunity is not only technically flawed, as many medical experts argue, but also epistemologically wrong in the case of COVID-19.