METHODS: We conducted a systematic search of peer-reviewed (Medline, Embase, PsycINFO), internet, and grey literature databases, from January 2000 through 2nd June 2025 and engaged international experts and relevant agencies liaising with key agencies focused on incarcerated populations (WHO, UNODC, UNAIDS and EUDA). Data on study methods, size of incarcerated populations and demographic characteristics, and prevalence of IDU, HIV, HCV, HBV and tuberculosis among incarcerated populations were extracted. Meta-analyses pooled data where multiple estimates were available for a country; regional and global estimates were calculated, weighted by incarcerated population size. We present overall country, regional and global prevalence estimates for each variable examined, stratified by sex. We then estimated the ratio of IDU, HIV, HCV, HBV and tuberculosis prevalence among incarcerated populations compared to the general population.
RESULTS: Of 75,755 screened documents, 2,968 were eligible for data extraction. There are approximately 11,322,000 people aged 15-64 years incarcerated globally with their incarceration rate being 221 per 100,000 (29 per 100,000 among females and 404 per 100,000 among males). Substantial variation in rates across countries and regions were observed with the highest regional rate being in North America. Globally, we estimate that 11·9% of people who are incarcerated have ever injected drugs (1,348,000; 95%CI 1,061,500-1,687,000), 51·4 times higher than the general population. We estimate that 3·7% (95%CI 2·5-5·4) of people who are incarcerated globally are living with HIV (25.1· times higher than the general population); 11·7% (95%CI 7·7-17·1) have current HCV infection (15·6 times higher); 4·4% (95%CI 2·4-7·7) have current HBV infection (2·2 times higher) and 2·5% (95%CI 1·5-3·8) have active tuberculosis (45·3 times higher than the general population). There is substantial variation geographically and among females and males.
CONCLUSION: The substantial concentration of people with multiple risks and comorbidities requires improved strategies to screen, evaluate, treat and prevent these adverse consequences, which is crucial for global control efforts.
FUNDING: Australian National Health and Medical Research Council.
METHODS: We conducted a systematic review of evidence for provision of opioid agonist treatment (OAT), needle syringe programs (NSPs), HIV testing and antiretroviral therapy (ART), hepatitis C virus (HCV) testing and direct-acting antiviral (DAA) treatment, tuberculosis screening and treatment, hepatitis B virus (HBV) testing, treatment, and vaccination in carceral settings. We searched from peer-reviewed and grey literature databases between 2000 and 2025 and used the most recent data available for each indicator.
FINDINGS: OAT was documented in 59/207 countries (29 %), and NSPs in ten (5 %). HIV testing was documented in 86 countries (42 %) and ART in 79 countries (38 %). HCV testing was confirmed in 55 (27 %), with DAA treatment in 47 (23 %). HBV testing was identified in 51 countries (25 %), treatment in 36 (17 %), and vaccination in 41 (20 %). Tuberculosis screening was documented in 96 countries (46 %) and treatment in 81 (39 %). Fewer than 2 % (approximately 172,000) of the 11.3 million people incarcerated worldwide live in countries that offer OAT, NSPs, and treatment for HIV, HCV, HBV, and tuberculosis in at least one carceral facility. There is not a single country where incarcerated people have access to all such services in every facility. Programme level evidence was rarely available.
INTERPRETATION: The global shortage of services that prevent and treat infectious disease and harms related to injecting drug use in carceral settings is a critical public health issue and, compared with community standards, a breach of human rights. This study underscores the urgent need for international collaboration and policy reform to scale up and stabilise services that address the health needs of incarcerated populations, ultimately improving health outcomes for both incarcerated populations and wider community.
FUNDING: Australian National Health and Medical Research Council.
METHODS: The International Society of Global Health (ISoGH) used the Child Health and Nutrition Research Initiative (CHNRI) method to identify research priorities for future pandemic preparedness. Eighty experts in global health, translational and clinical research identified 163 research ideas, of which 42 experts then scored based on five pre-defined criteria. We calculated intermediate criterion-specific scores and overall research priority scores from the mean of individual scores for each research idea. We used a bootstrap (n = 1000) to compute the 95% confidence intervals.
RESULTS: Key priorities included strengthening health systems, rapid vaccine and treatment production, improving international cooperation, and enhancing surveillance efficiency. Other priorities included learning from the coronavirus disease 2019 (COVID-19) pandemic, managing supply chains, identifying planning gaps, and promoting equitable interventions. We compared this CHNRI-based outcome with the 14 research priorities generated and ranked by ChatGPT, encountering both striking similarities and clear differences.
CONCLUSIONS: Priority setting processes based on human crowdsourcing - such as the CHNRI method - and the output provided by ChatGPT are both valuable, as they complement and strengthen each other. The priorities identified by ChatGPT were more grounded in theory, while those identified by CHNRI were guided by recent practical experiences. Addressing these priorities, along with improvements in health planning, equitable community-based interventions, and the capacity of primary health care, is vital for better pandemic preparedness and response in many settings.