Immune cells can adapt to invading pathogens, deciding whether to fight now or prepare for the next battle

Understanding the flexibility of T cell memory can lead to improved vaccines and immunotherapies. Juan Gaertner/Science Photo Library via Getty Images Kathleen Abadie, University of Washington; Elisa Clark, University of Washington, and Hao Yuan Kueh, University of Washington How does your immune system decide between fighting invading pathogens now or preparing to fight