Revisiting the Hygiene Hypothesis

This chapter explores the revised understanding of the hygiene hypothesis, focusing on the significance of exposure to 'old friends'—harmless microbes that support healthy immune development, particularly in children. It highlights the concerning rise in food allergies in the developed world and discusses how decreased interaction with beneficial microbes due to modern living may be impacting children's health. The conversation advocates for a balanced approach to hygiene, encouraging safe interactions with nature while maintaining necessary cleanliness to safeguard against harmful pathogens.