Multi-morbidity is associated with adverse health outcomes and healthcare costs, especially among the elderly [1,2]. Preliminary evidence suggests that multi-morbidity is associated with confirmed COVID-19 infections notably among the elderly with several co-morbidities [3–5]. Furthermore, it has been hypothesized that COVID-19 is associated with incident atrial fibrillation (AF) but large studies are lacking to test this hypothesis [6–8].