Do Lockdowns Work? Only If You Lock the Borders Down, Too

Noah Carl in Quillette:

For almost a year, the central policy debate in most Western countries has been whether—and for how long—to impose lockdowns. Advocates of stringent lockdowns argue that measures such as stay-at-home orders and forced closures of businesses are necessary to save lives and prevent health-care systems from being overwhelmed. So-called “lockdown sceptics,” on the other hand, argue either that such measures are ineffective, or that their benefits are outweighed by the associated social and economic costs; and that a focussed protection strategy is preferable. (The term “lockdown,” as I am using it, does not encompass all non-pharmaceutical interventions. In particular, I am excluding non-onerous, common-sense measures like asking symptomatic individuals to self-isolate, encouraging vulnerable people to work from home, and restricting large indoor gatherings.)

The evidence suggests that lockdowns have been effective, but only when they were combined with strict border controls.

More here.