How mRNA Medicines Work

mRNA medicines do not deliver a drug, they deliver the instructions and let your own cells build it. That inversion, and the decades of work behind it, is one of the biggest stories in modern biotechnology. This cursus explains it end to end: the engineered mRNA strand and the Kariko-Weissman modified-nucleoside breakthrough that made it usable, the lipid nanoparticle that smuggles it into cells, and what the platform can treat, from COVID vaccines to personalized cancer vaccines and beyond, with the honest limits that remain.