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  "path": "/news/2026-03-tracking-tool-reveals-cells.html",
  "publishedAt": "2026-03-05T15:00:09.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "Our immune system relies on T cells to fight infections. But T cells don't just show up and react—first, they train, get a game plan, and coordinate their defenses in lymphoid organs. Researchers have struggled to understand how this counteroffensive evolves across these sites. Now, a new tool from researchers at The Rockefeller University and Biohub allows scientists to permanently tag recently activated T cells with a fluorescent protein to track how they travel and change during an infection.",
  "title": "New tracking tool reveals how T cells adapt in different organs"
}