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Early-life exposure to allergens triggers a distinct local mode of dendritic cell activation in neonatal skin without requiring migration to lymph nodes, which shapes responses to allergens in later life.
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Ultimately, the most rigorous traceability solutions, including QR codes and microchips, won't be useful if people don't actually check them as a condition of making their purchases. Imitators can simply counterfeit QR code labels, for example.
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