Pericarditis and myocarditis dont just magically appear.
Of course not. And the studies so far show that when triggered by covid the risk of getting seriously injured is vanishingly small when compared to the risk of injury from covid.
They changed the definition because the technology changed. The word 'trolley' used to mean cart but it doesn't any more because the technology changed. mRNA technology is over 50 years old but it only recently has been applied to vaccines, so that definition had to be changed.
Of course not. And the studies so far show that when triggered by covid the risk of getting seriously injured is vanishingly small when compared to the risk of injury from covid.
http://www.bcchildrens.ca/about/news-stories/stories/myocarditis-pericarditis-and-the-covid-19-vaccine
https://www.alberta.ca/assets/documents/health-myocarditis-and-pericarditis-following-covid.pdf
You're looking for hidden meanings when there are none.
"Immunization: The process of making you immune or resistant to an infectious disease, typically via vaccination"
https://www.verywellhealth.com/the-difference-between-immunization-and-vaccination-4140251
They changed the definition because the technology changed. The word 'trolley' used to mean cart but it doesn't any more because the technology changed. mRNA technology is over 50 years old but it only recently has been applied to vaccines, so that definition had to be changed.
Get a grip.