7e), the number of eosinophils in BAL (Fig. were also found in the lungs of asthmatic patients11. Th9 cells as a source of IL-9 contribute to allergic inflammation4,5. In humans, allergic donors have substantially more circulating Th9 cells than non-allergic donors12. Th9 cells are generated in vitro by culturing na?ve CD4+ T cells with IL-4 […]