On the CDC website. When CDC tabulates flu cases, they go from fall of one year to spring the next.
Reported Flu cases per CDC
https://www.cdc.gov/flu/about/burden/past-seasons.html
2018-2019……36,000,000
2019-2020……38,000,000
2020-2021……1675
What was the 2020-2021 flu season like?
Flu activity was unusually low throughout the 2020-2021 flu season both in the United States and globally, despite high levels of testing. During September 28, 2020–May 22, 2021 in the United States, 1,675 (0.2%) of 818,939 respiratory specimens tested by U.S. clinical laboratories were positive for an influenza virus.
https://www.cdc.gov/flu/season/faq-flu-season-2020-2021.htm
And to think there are still people who believe that somehow, that 2020-2021 flu season makes sense, because of the effectiveness of social distancing and masks. It’s stupidity at a level that is difficult to comprehend.