https://spectrum.ieee.org/the-human-os/biomedical/imaging/quantum-dots-encode-vaccine-history-in-skin http://news.mit.edu/2019/storing-vaccine-history-skin-1218 https://www.startpage.com/row/search?q=Human+Implantable+Quantum+Dot+Microneedle+Vaccination+Delivery+System&l=english