Don't ask me that!

MicroSALSA. If you're feeling those old school conspiracies, maybe some microhummus.

Maybe to put a second microchip in in case the first one fails from the stupidity in their bloodstream

Yes, and a microchip with any function to it would need a needle about 10 times larger than the ones we use

ah yes, because a microchip that can track you can also fit in your bloodstream