What we know and what we can do about it. Much of the world is experiencing a significant winter wave of the Omicron variant. Vaccinated people experience a decrease in effectiveness unless they get a booster shot, and a large proportion of America remains unvaccinated, painting a rather concerning picture. But, as Matthew Yglesias argues, that doesn’t mean there’s nothing we can or should be doing to save lives. In this instalment of Slow Boring, that policy surrounding travel, vaccine mandates as well as optimisation is key to battling this unsettling variation.