Immune cells share a common response state, each expressing it in its own way.

Your immune system relies on many different cell types working together, but scientists did not know the rules behind this teamwork. Researchers tested immune cells from 12 donors with 90 immune signaling molecules called cytokines. They discovered that for any person and trigger, cell reactions follow a clean, two-part system. First, the person and the trigger create a single shared reaction state across all cell types. Second, fixed rules for each cell type take that shared state and decide how each cell behaves. By knowing the cell types involved, you can map the reaction of one cell type directly onto another. This pattern works for new people, new triggers, and immune changes in the body over time.

Why it matters

This finding means that instead of studying each immune cell type separately, researchers can focus on a shared response state and how each cell type interprets it. That could speed up understanding of how the immune system reacts to infections, vaccines, or autoimmune diseases, and help design more targeted therapies.

Questions answered