Correct myself from a few day back, only about 50 million have gotten the booster. Fault on the math.
I had looked at CDC data and concluded 50% of the country got boosters but I was incorrect for adding the numbers. Approximately 50 million people per CDC data have taken the booster thus far.
Also the background rate of myocarditis is about 100-200 per million. Correcting a possible mistake decimal point from a few days ago.