Another nod to the hygiene hypothesis

Yet more evidence has come to light that early-life exposure to allergens and bacteria is good for children’s immune systems.

New research shows that infants exposed to a diverse range of bacterial species in house dust during the first year of life appear to be less likely to develop asthma in early childhood.

Children who were neither allergic nor prone to wheezing as three-year-olds were the most likely to have been exposed to high levels of bacteria and common allergens, the