This winter's U.S. COVID surge is fading fast, likely thanks to a 'wall' of immunity

This winter's COVID-19 surge in the U.S. appears to be fading without hitting nearly as hard as many had feared.

"I think the worst of the winter resurgence is over," says Dr. David Rubin, who's been tracking the pandemic at the PolicyLab at Children's Hospital of Philadelphia.

No one expected this winter's surge to be as bad as the last two. But both the flu and RSV came roaring back really early this fall. At the same time, the most contagious omicron subvariant yet took off just as the holidays...