IL4 and asthma: Current treatments for allergic dermatitis, rhinitis, asthma, and inflammatory bowel disease (IBD) do not offer a cure, but provide temporary relief; β-2 agonists and inhaled corticosteroids can be used for mild asthma symptoms, while antibodies to type 2-dependent cytokines (IL-4, IL-5, and IL-13) can be used for severe allergies [9].