According to Dr. Bryan Ardis, heart damage (which also includes Myocarditis) can be treated by B-vitamins, especially B9 and B12, see the following video
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Emergency Broadcast -with guest Dr Ardis
Dr Ardis discusses prevention treatments and vitamins to
help you with your immune system! A MUST WATCH
share with everyone Thank You
https://rumble.com/vnmmjr-emergency-broadcast-with-guest-dr-ardis.html
Dr. Ardis mentions this at ca. 29 minutes and 20 seconds.
The video was posted by "therevealreport".
He also made a recent video about the myocarditis topic specifically, here:
https://rumble.com/v23r09i-dr-bryan-ardis-on-myocarditis-and-suggested-protocols.html
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As very many people are now affected by myocarditis please forward and share this information, thank you!