Three decades of progress against tuberculosis are real but dangerously incomplete — and recent collapses in global health funding now threaten to unravel them before the world reaches its 2035 targets. For anyone tracking infectious disease as a longevity threat, this GBD 2023 analysis offers the most granular accounting yet of where TB control is succeeding, where it is stalling, and which biological and behavioral risk factors are sustaining transmission.
Drawing on vital registration records, surveillance systems, verbal autopsies, and minimally invasive tissue sampling across 204 countries and territories from 1990 through 2023, the analysis used the Cause of Death Ensemble model and DisMod-MR 2.1 to jointly estimate TB incidence, prevalence, and mortality stratified by age, sex, HIV co-infection status, and drug-resistance profile. Disability-adjusted life-years were computed as the sum of years of life lost and years lived with disability. A comparative risk assessment framework then attributed burden fractions to alcohol use, smoking, and elevated fasting plasma glucose — three modifiable exposures with well-established immunosuppressive and pro-inflammatory mechanisms that amplify TB susceptibility. While overall TB mortality declined substantially over the study period, progress toward the WHO End TB targets — a 95% mortality reduction and 90% incidence reduction by 2035 relative to 2015 — appears sharply off-track, with multidrug-resistant TB and HIV-associated TB constituting growing proportional shares of remaining burden.
This is a landmark confirmatory and benchmarking study rather than a paradigm-shifting one, but its scale and methodological rigor make it indispensable. The explicit stratification by HIV and MDR-TB status matters because these subpopulations face fundamentally different treatment pathways, costs, and outcomes. The inclusion of metabolic and behavioral risk factors in the attribution model is particularly valuable: it frames TB not merely as a poverty or access-to-care problem but as a disease shaped by preventable physiological states including hyperglycemia, which suppresses neutrophil and macrophage function. The study's key limitation is its reliance on modeled estimates in data-sparse settings, where uncertainty intervals widen substantially. For health-conscious adults in high-income countries, the practical signal is indirect — TB incidence there remains low — but the metabolic risk linkages underscore that systemic immune competence, influenced by diet and metabolic health, shapes vulnerability to pathogens far beyond influenza and COVID-19.