> Haha... Seriously? This is the narrative that was pushed indeed. Now it turns out that many people ravaged their health with these untested mRNA treatments. Search for myocarditis (even my GP now knows about this).

Conspiracy theories much? Myocarditis is extremely rare after mRNA vaccine. Since it's much more common after covid infection, and mRNA vaccines have a significant (though not perfect) preventative effect against infection, these vaccines have significantly decreased the incidence of myocarditis, not increased it. And mRNA vaccines weren't "untested" in 2020 - they'd been under development for nearly 50 years at that point, and the covid ones had been through a series of clinical trials (aka "tests") before becoming available to the public.