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Since 1990, the Global Burden of Disease Study (GBD) has guided health priority setting.1 GBD 2021, the most recent iteration at the time of writing, tracked incidence, prevalence, and severity of 371 ailments, aggregating diverse data sources to provide national and small-area estimates.1 GBD’s comprehensive accounting, which synthesises prevalence, morbidity, and mortality into disability-adjusted life-years (DALYs), has famously elevated the significance of non-fatal disability, including low back pain, migraines, and depression.
