New ‘micro-organ’ was hiding in plain sight - For the first time in decades, researchers have identified a new anatomical structure within the immune system, that ‘remembers’ past infections and vaccinations, and where immune cells gather to mount a rapid response.

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New ‘micro-organ’ was hiding in plain sight - For the first time in decades, researchers have identified a new anatomical structure within the immune system, that ‘remembers’ past infections and vaccinations, and where immune cells gather to mount a rapid response.