IL4 and food allergy: Furthermore, epidemiological studies have shown a strong statistical correlation between the risk of ASD and either maternal or infantile allergic/atopic disorders, including asthma, eczema, and food allergies which are often accompanied by elevated IL-4 (Sicherer et al. 2010; Chen et al. 2014; Lambrecht et al. 2019; Patel et al. 2020; Langan et al. 2020).