I'm saying this as someone who lost a family member to a combination of myocarditis and endocarditis resulting from a flu infection: I'm not attempting to downplay it. Myocarditis has the potential to be extremely serious, especially for those with pre-existing heart problems.

However, _in my opinion_ with how infectious omicron is, it is likely inevitable that everyone will eventually be exposed. The literature (linked in my GP) currently seems to indicate that vaccines have a lower risk of myocarditis than an active SARS-CoV-2 infection. Most literature that I've seen (so far) indicates that occurrences of post-vaccination myocarditis tends to be rare, and not life-threatening, and the patients tend to recover quickly.[1]

-----

[1]: https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.121.0...