Myocarditis is a very rare occurrence after the Pfizer vaccine, and no association with any other covid19 vaccine has been reported.
BUT myocarditis is also an occurrence after covid19 infection. I was told it was 1000 times more likely after covid19 than for the Pfizer vaccine.
Early in the covid19 epidemic, there was significant research into cardiac outcomes of covid19. Medical journals were publishing preliminary investigations from around the western world. The research from China and Russia was scarce and not effectively peer reviewed. There was speculation that it was politically influenced. Why do we not have access to Sinovax or Russovax? This early research was not conclusive, and would now be found within the "long covid" research.
I have had a heart transplant, and I am therefore mo susceptible to all infections than almost every other person, somIm more motivated to stay safe than most people. I get my information from my transplant team, cancer specialists and other medicos, as well as the Journal of the American Medical Association, other reliable medical articles and a couple of other medical publications.
In general, the dominant covid sub variants are far less dangerous than the virus going around in 2020/21. Viruses have to evolve to strike a balance between severity and “deadliness” and transmissibility. The initial few covid variants struck that balance in the sweet spot. As more hosts have become harder to infect (due to mass vaccinations) the virus has mutated become more transmissible. The trade off is that it's no longer as dangerous. I had covid19 in 2021. My team quickly arranged the antivirals for me because they were highly effective back then. Last year I got the flu. I tested negative for covid19. My team stated that they wouldn’t rush to get me the antivirals, and would let me “ride it out”. The antivirals are almost exclusively given once someone is in ICU now.
Covid19 will most likely be around on an ongoing basis now, but it has evolved into something about as dangerous and transmissible as the flu. For those who are immunocompromised or aged, it can be dangerous and even fatal (I’m in that category). I’m guessing that the vaccine will be developed as a mixed covid19/ influenza vaccine. It’ll be an annual shot, best taken in Autumn. The medicos seem to agree with me. If you’re young and fit, you will probably survive covid19 just as you survive the flu. Unlike the flu, the long term covid effects need to be considered though.