Asthma exacerbation profile of benralizumab for severe eosinophilic asthma (the BenRex study): a multicentre, prospective cohort study

The BenRex study investigated the biological mechanisms underlying asthma exacerbations in patients with severe eosinophilic asthma receiving benralizumab. The Vitalograph Micro spirometer was used to perform spirometry and peak expiratory flow (PEF) measurements, monitoring lung function and changes in airway obstruction during exacerbations