Comment Re: No reason against mRNA (Score 1) 147
Heart cells get renewed extremely slowly. For those with severe damage, it seems that in a recent study of people with LCD implants, they were regenerating at a 6x faster rate. So it's more fair to say that the rate of regeneration is very slow but correlates with how heavy of a contraction load it's dealing with.
Anyway, damage enough to notice is generally a relatively rare side effect of either the vaccine or illness but totally dependent on your specific immune system so it's hard to predict in advance.