New York City is seeing some of the highest levels in the country.
Health officials say the child, who wasn't a year old yet, died at the hospital after suffering from "respiratory difficulties."
Across the country, 38 states are experiencing high or very high levels of respiratory illness activity, including California.
January and February are expected to be the worst for flu, RSV and COVID-19. Infectious disease experts say now is the time to exercise vigilance.
Here's what we know about the tripledemic and healthy habits to avoid catching respiratory illnesses this season.
When it comes to holiday travel, there's a question many are mulling over -- should you still wear face masks?