An explicit or implicit CBA of public health interventions has always been part of the public health literature. The greatest failure of the WHO in 2020-22 has been to not follow its own CBA guidelines (from 2006). Without a CBA public health policy WILL ALWAYS KILL, not save.
https://apps.who.int/iris/handle/10665/43570
Also see https://bit.ly/3yO2No9.