GSK press releases Follow Real-world effectiveness evidence among GSK data presented at ERS 2019 GlaxoSmithKline will for the first time share data on the effectiveness of mepolizumab in severe eosinophilic asthma patients https://www.gsk.com/en-gb/media/press-releases/real-world-effectiveness-evidence-among-gsk-data-presented-at-ers-2019/ gsk.com