The collaborative research team formed by the Department of Pharmacology and Pharmacy and Department of Microbiology, LKS Faculty of Medicine, The University of Hong Kong (HKUMed), has developed an inhalable dry powder formulation of tamibarotene, a repurposed drug that exhibits broad-spectrum antiviral activity against SARS-CoV-2, MERS-CoV and influenza A H1N1 virus following pulmonary delivery. The