Fluorinated lipid nanoparticles enable real-time tracking of mRNA delivery and uncover spatiotemporal mechanisms of immune activation. - Xie K; Zhu L; Duan M; Fu Y; Wang H; Shen Y; Li Y; Wang R; Jiang ZX; Chen S; Suk JS; Chen D; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2026)