Epidemiologist Katelyn Jetelina publishes regular, extremely informative updates of the state of respiratory infectious diseases in the U.S. This was the punchline of her most recent one, published on December 5:
Respiratory illnesses continue to increase due to colder temperatures, changes in human behavior (i.e., holidays), and viruses mutating, like Covid-19.
As shown in this figure, overall respiratory illness levels are high or very high in almost half the country, and we are still fairly early in the season:
...