In the two-and-a-half years since the start of the COVID-19 pandemic, the flu has remained relatively inactive in the U.S. That said, the seasonal influenza won't lay low forever. In fact, scientists suspect that the flu is likely to flare up into something serious this fall and winter, increasing the possibility of a so-called "twindemic," or a simultaneous surge in cases of COVID-19 and influenza.
Here's what you'll want to know about this possibility.
