By far, the most extensive strategy is re-labeling. Flu is called COVID.
We don't need charts and graphs to see this. It's right in front of our eyes.
The definition of a COVID case allows flu in the door. There is nothing unique about that definition. For example, a cough, or chills and fever, would constitute "a mild case of COVID."  
A positive PCR test for SARS-CoV-2 would also be required, but as I've shown in my recent series on the test, obtaining a false positive is as easy as pie. 
All you have to do is run the test at more than 35 cycles. Most labs run the test at 40 cycles. A cycle is a quantum leap in magnification of the swab sample taken from the patient. When you run the test at more than 35 cycles, false-positives come pouring out like water from a fire hose.   [5a] [5b]
So…with ordinary flu symptoms plus a false-positive PCR test…voila, you have a COVID case.
Keep in mind that, overwhelmingly, most COVID cases are mild. In other words, they're indistinguishable from ordinary flu.
But there is a rabbit hole here, and we can go down that hole much farther. The next question is: what is a flu case? What is it really?
Researcher Peter Doshi did much to answer that question. In December of 2005, the British Medical Journal (online) published his shocking report, which created tremors through the halls of the CDC, where "the experts" used to tell the press that 36,000 people in the US die every year from the flu.