What is the fine-grained topic of the following text: Recent evidence suggests that having a pet in the house reduces the risk of developing childhood allergic disorders, eczema, and asthma.7 These changes to the guidelines on early allergen exposure may help to prevent the incidence of childhood atopic diseases and support a healthier microbiome. Only return the topic.
The impact of pets on reducing the risk of childhood allergic disorders and supporting a healthier microbiome.