[HMH]

> 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.

[scubadude]

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.