As winter approaches, pretty much every public health expert I follow is anticipating a COVID-19 surge. The size and severity of that surge may depend in part on SARS-CoV-2 variants. As a result, experts are closely watching a few current variants that might lead to faster COVID-19 spread this winter. Here’s a review of what’s circulating right now, what to watch for in the coming weeks, and how our public health system is tracking the variants.