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A species of gut bacteria may be responsible for preventing allergies in children.
Allergies have become much more common in industrialised countries since the mid-20th century, but it’s still not clear why.
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Some evidence points to the microbiome – the community of bacteria that live inside our bodies – as a possible factor. Children whose mothers take probiotic supplements seem to have a lower risk of allergies, while those born by caesarean section, which affects the acquisition of bacteria in the gut, may have a higher risk.
Cathryn Nagler …