The vaccine is a measured, limited, non-self-replicating dose of spike protein RNA which your cells fold into spike protein. Nearly all of it ends up in the lymph nodes near your armpit, where your immune system learns how to destroy it (and then does).
A COVID infection is a self-replicating, theoretically unlimited dose of spike protein RNA which your cells fold into spike protein. If you’re lucky, it’ll mostly affect your respiratory system. But if your immune system can’t respond quickly enough, it will spread and replicate all over your body.
> Nearly all of it ends up in the lymph nodes near your armpit
Not sure how the situation is in other countries but in Germany they started recommending aspiration (used to make sure no blood vessel is hit) a few months ago due to concerns of the mRNA getting into your blood stream and causing adverse effects like that.
From my understanding, you want it in the lymph system (hence muscular injection). It is believed that issues like myocarditis are where the injection might hit a vein.
A COVID infection is a self-replicating, theoretically unlimited dose of spike protein RNA which your cells fold into spike protein. If you’re lucky, it’ll mostly affect your respiratory system. But if your immune system can’t respond quickly enough, it will spread and replicate all over your body.