aluminum adjuvants in vaccines are transported by monocytes to the brains of rats: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4318414/

I’m betting this works the same way in people, but hey, who knows. This study was published in 2015, so it’s a good thing they took another look at aluminum adjuvant safety in 2018 by measuring *blood* levels of aluminum post vaccination… Amazingly, since aluminum doesn’t show up in the blood, and no one is looking to confirm that aluminum does get transported through the lymphatic system in humans there is no proof that vaccines are harmful.