MIT also developed iron-oxide nanoparticles for MRI to replace Gd. https://phys.org/news/2017-02-iron-oxide-nanoparticles-rare-side.html

MIT developed copper-based quantum dots to store vax info below the skin's surface. https://news.mit.edu/2019/storing-vaccine-history-skin-1218

Here's the guy who is the lead on this kind of research. https://phys.org/news/2017-04-quantum-dots-emit-infrared-window.html

"Light-emitting particles have been a specialty of Bawendi, the Lester Wolf Professor of Chemistry, whose lab has over the years developed new ways of making quantum dots. These nanocrystals, made of semiconductor materials, emit light whose frequency can be precisely tuned by controlling the exact size and composition of the particles."

Problem is, the needle is an inch long so it injects an inch deep. Magnetic force works according as a square law so the attraction force at 1 inch is about a hundred times weaker than the force at 1/20 inch deep.

And if you are suggesting that ferromagnetic particles managed to creep back up to hide just under the skin, I'd like you to calculate how many grams it would take to hold a neodimium magnet there. Just as a guess, I reckon it would take at least a pin-head of iron (or cobalt) but probably more, even accounting for skin friction to prevent its slipping. That's a lot of molecules.

It's probably a GMO protein called ferritin. https://www.theguardian.com/science/neurophilosophy/2016/mar/24/magneto-remotely-controls-brain-and-behaviour

Is this their proof of the shot?