Researchers headed by a team at the Massachusetts Institute of Technology (MIT) have created a microneedle platform using fluorescent microparticles called quantum dots (QD), which can deliver vaccines and at the same time invisibly encode vaccination history directly in the skin. The quantum dots are composed of nanocrystals, which emit near-infrared (NIR) light that can be detected by a specially equipped smartphone. Tests using the platform showed that QDs delivered to samples of human skin were still detectable after photobleaching that simulated five years of exposure sunlight, and they remained detectable for up to nine months… (READ MORE)
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