Why Moderna's vaccine causes myo-&pericarditis 3times more? AZD-8601 project will be the answer!

I'm sorry for no exist of English subtitles.
I'm medical doctor in Seoul, South Korea.
Moderna's and other's mRNA COVID19 vaccine causes 3 times more myocarditis and pericarditis S/E than other vaccines. It's meaningful scale. In this video, I suggest one clue.