For decades, scientists believed the immune system naturally weakens as we age. Georgia Tech researchers have discovered a way to deliver molecular instructions to “exhausted” T cells — restoring the ability to multiply and fight diseases. Silicon nanowires deliver new biological instructions without damaging the cells — producing effects that last about two weeks. The body’s cells still grow older, but now they may not have to act like it. #WeCanDoThat 🐝🔬 Link in bio 🔗 📸 A scanning electron micrograph from the lab of Ankur Singh and Zhonghao Dai shows aged human T cells resting on top of a bed of microscopic silicon nanowires, which are engineered to interact directly with the cells and restore their youthful function. 📸 Dai and graduate researcher Shaylyn Grier examine a lab sample.