In battling disease, white blood cells called eosinophils play a supporting role to their better-known immune system partners, T cells and antibodies. Scientists know that eosinophils work diligently against some parasites. Beyond that, their role remains mysterious. This much is clear, however: Eosinophils can make trouble for their host.
Researchers report in the April Nature Immunology that allergic reactions to food coincide with an accumulation of eosinophils in the small intestine.
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