Citation needed on the “already immune” bit. So far studies have shown that immunity to the corona wears off, and most people can be reinfected months to a year later.
The incremental benefit of a healthy young person getting vaccinated after already having had Covid may be quite small. Plus the incidence of myocarditis in this group (vaccinated after having had Covid) could well be higher than it is in people getting vaccinated who haven't had Covid. (This is plausible, since as seen in this study, the risk is higher for the second shot, when the immune system has already been stimulated before.)
There is no such thing as "already immune due to having had COVID".
Unvaccinated individuals were observed to have far higher reinfection rates than vaccinated individuals (over 5-fold higher chances).
https://www.cdc.gov/coronavirus/2019-ncov/your-health/reinfe...
> (...) would be best advised not to get an mRNA vaccine.
This assertion is not only entirely baseless but also completely ignores the fact that a) unvaccinated individuals are a couple orders of magnitude more likely to die from COVID, b) the myocarditis issue pinned to vaccines is benign and transitory, and estimated to be at most less than 5 cases per 100 000 vaccinnees.
However, as they say, "...persons who have been vaccinated are possibly less likely to get tested. Therefore, the association of reinfection and lack of vaccination might be overestimated."
One thing to think about is that "every nations medical experts" are heavily committed to a narrative that vaccines are good, and hence may be disinclined to admit there are exceptions to this (such as healthy young males who have already had covid). They may think that the vaccine is good for most people, and that they should therefore pretend that it's good for everyone to avoid "confusion"...
It does seem that a young male already immune due to having had Covid would be best advised not to get an mRNA vaccine.