[pmccarren]

Pure, unadulterated speculation:

It felt like the mRNA took hold in both my arm, _and_ my heart. Which given the proximity and paths between, is not entirely surprising.

It felt like the vaccine entered my bloodstream and was taken up, in part, by the heart. Which then started making spike protein and soliciting an immune response.

I'd really love to learn more about this, but haven't been able to find any good resources. If anyone can point me in the right direction, I'm all ears!

[bialpio]

This post was interesting to me and would mean that if the shot got into your bloodstream, it could've been mis-administered? https://news.ycombinator.com/item?id=27464226

[pmccarren]

That is very intriguing.

The location of injection site was spot on. However, I'm unsure if there are other factors at work beyond specifically location

[nicoburns]

I was also wondering that. There was only the tiniest spot of blood when I got mine.