To describe the regional differences in the innate immune system of the skin using intra-vital multiphoton microscopy and understand its functional consequences in a cutaneous parasite infection model.

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This study is the first of its kind to map the innate immune system, the body's first line of defence, in the skin - coined the "immune atlas". Researchers have shown regional differences in innate immune cells which could explain how infections develop at different sites of the body. Although they have shown this in a cutaneous leishmaniasis model, a parasite endemic in most parts of the world, it may have implications also for inflammatory skin conditions such as eczema or psoriasis.