The anti-interleukin-5 receptor alpha monoclonal antibody benralizumab significantly reduced the rates of severe exacerbations (SevEx) and asthma worsening episodes (AWE) in patients with severe asthma, leading to a reduction in the risk of overall CompEx* events, according to a post hoc analysis of the phase III SIROCCO** and CALIMA*** trials presented at ATS 2019.