In many high-income countries, over one in ten children are diagnosed with food allergies, with the incidence of such allergies continuing to rise at an alarming rate. However, according to a recent study published in the journal PLoS ONE, children exposed to pet cats or indoor dogs during fetal development and early infancy tend to have fewer food allergies in comparison to other children. The scientists used data from the Japan Environment and Children’s Study (JECS) – a nationwide, prospective birth cohort – to investigate the associations...