Some of the worst days of Covid in the U.S. have come as winters have settled in, and surges led hospitals to overflow and caused hundreds of thousands of deaths.
A comparable surge has yet to materialize on a similar timeline this winter. By now, hospitalizations in particular would have started to sharply rise. Instead, data suggests that more of a Covid bump than a surge has emerged. Recent hospitalization figures are much lower than the past, largest surges, as this chart by my colleague Ashley Wu demonstrates:
Daily average U.S. Covid patients in the hospital
There is some geographic variation. Covid hospitalizations have risen more quickly in the Northeast and South in recent weeks, potentially driven by a new Omicron subvariant. But even there, hospitalization levels are closer to the summer increase caused by the Delta variant in 2021 than to the following winter surge caused by the Omicron variant.
Some Western states are reporting among their lowest hospitalization rates since the pandemic began.
Daily average Covid hospitalization rates
After years of winter surges, the absence of one translates to potentially tens of thousands fewer deaths and is worth celebrating, even if it ends up being a temporary reprieve. Today’s newsletter will look at the lack of a winter surge so far and what that means for Covid’s future.
Population immunity
Why have we avoided the typical winter surge? Because the U.S. population has, collectively, built up immunity to the virus. Much of that is thanks to vaccines and boosters. But repeated exposure to the virus and infections have played a significant role, too.