We know they are thinking about nanotech in vaccines, but no I dont' think there is solid proof of say 'nanobots' or other such things in vaccines.  They are talking about targetting delivery, nanoemulsions (liposomal delivery), and this kind of thing.   But there ARE the plans to do this kind of thing.,  You can see in some of the links below to very real projects in the DEFENSE / Research (DARPA) domain, where they are up to some very weird things in the domain of human-nano deliver interfaces  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2861897/ https://www.forbes.com/sites/katiedrummond/2012/07/31/body-on-chip/#2a91ceac4e3f https://news.mit.edu/2012/human-body-on-a-chip-research-funding-0724 https://preventdisease.com/news/09/100509_injectable_nano_microchips.shtml http://www.thesleuthjournal.com/bill-gates-population-control-microchip-2018/ https://vaxxter.com/vaccine_contaminants_nano_cancer/ RFK jr's website childrenshealthdefense is the best site for real anti vax information -- it's absoltuely unhelpful for them to post unfounded information, it works against them. https://childrenshealthdefense.org/category/news/vaccines/