Risk factors for SARS-CoV-2 related severe Multisystem Inflammatory Syndrome in Children investigated in a Swedish population-based study. 23 Jun, 2022 | 10:36h | UTC News Release: Risk factors for severe COVID-19 complication in children investigated in Swedish population-based study – Karolinska Institutet Original Study: Risk factors for multisystem inflammatory syndrome in children – A population-based cohort study of over 2 million children – The Lancet Regional Health Europe