What's an expected timeframe for the hypothesis that "everyone" will get it? What is the risk reduction of getting it despite being vaccinated? The overwhelming

What's an expected timeframe for the hypothesis that "everyone" will get it? What is the risk reduction of getting it despite being vaccinated? The overwhelming majority of Myocarditis cases happen on the second shot, what are the implications of administering booster shots? All of these questions remain to be answered. Furthermore, new vaccines, treatments and prophylaxes are still being developed. Those may have a more favorable risk profile.