Haroon Ahmed

57222316680

Publications - 3

Global, regional, and national trends in routine childhood vaccination coverage from 1980 to 2023 with forecasts to 2030: a systematic analysis for the Global Burden of Disease Study 2023

Simeon Okechukwu Ajakwe Mushood Ahmed Naveed Ahmed Rana Kamal Abu Farha Eman Abu-Gharbieh Aanuoluwapo Adeyimika Afolabi Giuseppina Affinito Kamoru Ademola Adedokun Nurudeen A. Adegoke Dolapo Emmanuel Ajala Armita Abedi Usha Adiga Mitra Abbasifard Mohammad Amin Aalipour Aqeel Ahmad Dariush Abtahi Ripon Kumar Adhikary Mohd Adnan Williams Agyemang-Duah Danish Ahmad Hana J. Abukhadijah Rotimi Felix Afolabi Saira Afzal Emad M. Abdallah Meqdad Saleh Ahmed Muktar Beshir Ahmed Syed Anees Ahmed Suneth Buddhika Agampodi Ayman Ahmed Khurshid Ahmad Tauseef Ahmad Sepehr Aghajanian Meriem Abdoun Salahdein Aburuz Lucas Guimarães Abreu Qorinah Estiningtyas Sakilah Adnani Olivia D. Nesbit Taylor Noyes Noga Shalev Latera Tesfaye Olana Catherine Bisignano Emily Haeuser Sam Byrne Jason Nguyen Catalina Raggi Susan A. McLaughlin Ashley A. Harris Amanda E. Smith Paulina A. Lindstedt Georgia Smith Samuel James Herold Rana Kamal Abu Farha Dmitry Abramov Sherief Abd-Elsalam Hedayat Abbastabar Faezeh Abbaspour Reda Abdel-Hameed Samar Abd ElHafeez Atef Abdelkader Adam Abdullahi Kulmira Abdykerimova Deldar Morad Abdulah Abdu A. Adamu Haroon Ahmed Rahim Abo Kasem Lisa C. Adams Toufik Abdul-Rahman Constanza Elizabeth Aguilera Arriagada Mahsa Ahadi Rabbiya Ahmad Shoaib Ahmad Asrat Agalu Abejew Juliana Bunmi Adetunji Bilyaminu Abubakar Ousman Adal Meshack Achore Nagah M. Abourashed Mohamed Abouzid David Adedia Oyelola A. Adegboye Habeeb Abiodun Afolabi Roberto Ariel Abeldaño Zuñiga Anirudh Balakrishna Acharya Juan Manuel Acuna Arman Abdous Auwal Abdullahi Hasan Aalruz Dhiraj Motilal Agarwal Syed Hani Abidi Abdullahi Tunde Aborode Olumide Abiodun Richard Gyan Aboagye Hassan Abolhassani Ulric Sena Abonie Wakgari Mosisa Abdisa Prince Owusu Adoma Leticia Akua Adzigbli Tajudeen Adesanmi Adebisi Oluwatobi E. Adegbile Olumide Thomas Adeleke Mache Tsadik Adhana

Publication Name: Lancet

Publication Date: 2025-07-19

Volume: 406

Issue: 10500

Page Range: 235-260

Description:

Background: Since its inception in 1974, the Essential Programme on Immunization (EPI) has achieved remarkable success, averting the deaths of an estimated 154 million children worldwide through routine childhood vaccination. However, more recent decades have seen persistent coverage inequities and stagnating progress, which have been further amplified by the COVID-19 pandemic. In 2019, WHO set ambitious goals for improving vaccine coverage globally through the Immunization Agenda 2030 (IA2030). Now halfway through the decade, understanding past and recent coverage trends can help inform and reorient strategies for approaching these aims in the next 5 years. Methods: Based on the Global Burden of Diseases, Injuries, and Risk Factors Study 2023, this study provides updated global, regional, and national estimates of routine childhood vaccine coverage from 1980 to 2023 for 204 countries and territories for 11 vaccine-dose combinations recommended by WHO for all children globally. Employing advanced modelling techniques, this analysis accounts for data biases and heterogeneity and integrates new methodologies to model vaccine scale-up and COVID-19 pandemic-related disruptions. To contextualise historic coverage trends and gains still needed to achieve the IA2030 coverage targets, we supplement these results with several secondary analyses: (1) we assess the effect of the COVID-19 pandemic on vaccine coverage; (2) we forecast coverage of select life-course vaccines up to 2030; and (3) we analyse progress needed to reduce the number of zero-dose children by half between 2023 and 2030. Findings: Overall, global coverage for the original EPI vaccines against diphtheria, tetanus, and pertussis (first dose [DTP1] and third dose [DTP3]), measles (MCV1), polio (Pol3), and tuberculosis (BCG) nearly doubled from 1980 to 2023. However, this long-term trend masks recent challenges. Coverage gains slowed between 2010 and 2019 in many countries and territories, including declines in 21 of 36 high-income countries and territories for at least one of these vaccine doses (excluding BCG, which has been removed from routine immunisation schedules in some countries and territories). The COVID-19 pandemic exacerbated these challenges, with global rates for these vaccines declining sharply since 2020, and still not returning to pre-COVID-19 pandemic levels as of 2023. Coverage for newer vaccines developed and introduced in more recent years, such as immunisations against pneumococcal disease (PCV3) and rotavirus (complete series; RotaC) and a second dose of the measles vaccine (MCV2), saw continued increases globally during the COVID-19 pandemic due to ongoing introductions and scale-ups, but at slower rates than expected in the absence of the pandemic. Forecasts to 2030 for DTP3, PCV3, and MCV2 suggest that only DTP3 would reach the IA2030 target of 90% global coverage, and only under an optimistic scenario. The number of zero-dose children, proxied as children younger than 1 year who do not receive DTP1, decreased by 74·9% (95% uncertainty interval 72·1–77·3) globally between 1980 and 2019, with most of those declines reached during the 1980s and the 2000s. After 2019, counts of zero-dose children rose to a COVID 19-era peak of 18·6 million (17·6–20·0) in 2021. Most zero-dose children remain concentrated in conflict-affected regions and those with various constraints on resources available to put towards vaccination services, particularly sub-Saharan Africa. As of 2023, more than 50% of the 15·7 million (14·6–17·0) global zero-dose children resided in just eight countries (Nigeria, India, Democratic Republic of the Congo, Ethiopia, Somalia, Sudan, Indonesia, and Brazil), emphasising persistent inequities. Interpretation: Our estimates of current vaccine coverage and forecasts to 2030 suggest that achieving IA2030 targets, such as halving zero-dose children compared with 2019 levels and reaching 90% global coverage for life-course vaccines DTP3, PCV3, and MCV2, will require accelerated progress. Substantial increases in coverage are necessary in many countries and territories, with those in sub-Saharan Africa and south Asia facing the greatest challenges. Recent declines will need to be reversed to restore previous coverage levels in Latin America and the Caribbean, especially for DTP1, DTP3, and Pol3. These findings underscore the crucial need for targeted, equitable immunisation strategies. Strengthening primary health-care systems, addressing vaccine misinformation and hesitancy, and adapting to local contexts are essential to advancing coverage. COVID-19 pandemic recovery efforts, such as WHO's Big Catch-Up, as well as efforts to bolster routine services must prioritise reaching marginalised populations and target subnational geographies to regain lost ground and achieve global immunisation goals. Funding: The Bill & Melinda Gates Foundation and Gavi, the Vaccine Alliance.

Open Access: Yes

DOI: 10.1016/S0140-6736(25)01037-2

The burden of bacterial antimicrobial resistance in the WHO Eastern Mediterranean Region 1990–2021: a cross-country systematic analysis with forecasts to 2050

Haroon Ahmed Armita Abedi Hmwe Hmwe Kyu Gisela Robles Aguilar Nicole Davis Weaver Eve E. Wool Neeraj Bedi James A. Berkley Tomislav Mestrovic Lucien R. Swetschinski Aqeel Ahmad Shahkaar Aziz Khalil Azizian Hiba Jawdat Barqawi Kenneth Chukwuemeka Iregbu Faisal Ismail Abdollah Jafarzadeh Mahsa Jalili Reza Jalilzadeh Yengejeh Elham Jamshidi Nabi Jomehzadeh Daniel T. Araki Anna Gershberg Hayoon Authia Gray B Chieh Han Tim Eckmanns Amir Mahmoud Ahmadzade Jessica Andretta Mendes Jason R. Andrews Jalal Arabloo Mosab Arafat Rasool Haddadi Mostafa Hadei Sobia Ahsan Halim Samer Hamidi Kevin S. Ikuta Ahmed I. Hasaballah Rumina Syeda Hasan Hamidreza Hasani Andrea Haekyung Haselbeck Simon Hay B, C Emily Rosenblad Zahid Ali Abid Ali Liaqat Ali Syed Shujait Ali Sabah Al-Marwani Omar Almidani Alireza Feizkhah Denise O. Garrett Ramy Mohamed Ghazy Ayesha Fahim Ali Fatehizadeh Muhammed Shaffi Fazaludeen Koya Saira Afzal Rami H. Al-Rifai Jaffar A. Al-Tawfiq Karem H. Alzoubi Seyyed Shamsadin Athari Maha Moh'd Wahbi Atout Sina Azadnajafabad Natalia V. Bhattacharjee Colin Stewart Brown Yasser Bustanji Ben S. Cooper Nihar Ranjan Dash Sally Ellis Sama Ghoba Konstantinos Giannakis Kamal Hezam Mehdi Hosseinzadeh Rebecca L. Hsu Nawfal R. Hussein Mohammad Tarique Imam Omar Makram DE, DF Elaheh Malakan Rad Florian Marks Barney McManigal Christiane Dolecek Abdelaziz Ed-Dra Iman El Sayed Muhammed Elhadi Waseem El-Huneidi Christelle Elias Zul Kamal Hengameh Kasraei Faham Khamesipour Ayman Ahmed Mohsen Naghavi Mansour Adam Mahmoud Ibrahim Elsohaby Salahdein Aburuz Babak Eshrati Feriha Fatima Khidri Suwimon Khusuwan Mohammed Kuddus Sherief Abd-Elsalam Haroon Ahmed Abid Ali Nabi Jomehzadeh Hasan Aalruz Hassan Abolhassani Zarrin Basharat Salahdein Aburuz Mohammad Tarique Imam

Publication Name: Lancet Public Health

Publication Date: 2025-11-01

Volume: 10

Issue: 11

Page Range: e955-e970

Description:

Background Antimicrobial resistance (AMR) is an urgent global crisis and one of the world's most complex challenges. Although there is increasing evidence of its impact on human mortality and morbidity, precise burden estimation has many challenges, and thus far has been elusive for the Eastern Mediterranean Region. Here, we present a comprehensive time-trend analysis of regional and country-level AMR burden estimates in the WHO Eastern Mediterranean Region (EMR), between 1990 and 2021, with forecasts up to 2050. Methods We estimated deaths and disability-adjusted life-years (DALYs) attributable to and associated with AMR for 11 infectious syndromes, 22 bacterial pathogens, and 84 pathogen–drug combinations for the WHO EMR and each of its countries from 1990 to 2021. Data were obtained from mortality registries, surveillance systems, hospital records, systematic literature reviews, and other sources. We based our modelling approach on five broad components: the number of deaths in which infection had a role, the proportion of infectious deaths attributable to a given infectious syndrome, the proportion of infectious syndrome deaths attributable to a given pathogen, the percentage of a given pathogen resistant to an antimicrobial drug of interest, and the excess risk of mortality (or duration of an infection) associated with this resistance. These components were then used to estimate the disease burden by using two counterfactual scenarios: deaths and DALYs attributable to AMR (considering an alternative scenario where drug-resistant infections are replaced with susceptible infections), and deaths and DALYs associated with AMR (considering an alternative scenario where infections would not occur at all). Predictive statistical modelling was applied to generate estimates of AMR burden for each country. We also generated AMR burden forecasts up to 2050. We generated 95% uncertainty intervals (UIs) for the final estimates by taking the 2·5th and 97·5th percentiles across 500 draws through the multistage computational pipeline, and models were cross-validated for out-of-sample predictive validity. Findings We estimated 380 000 deaths (95% UI 332 000–426 000) associated with bacterial AMR and 92 800 deaths (78 300–111 000) attributable to bacterial AMR in the EMR in 2021. In the past 31 years, there was considerable variation in AMR mortality trends across countries of the region and different age groups. Between 1990 and 2021, associated deaths among children younger than 5 years decreased by 50·0% (38·2–62·0), while those among adults aged 70 and older rose by over 85·7% (95% UI 57·0–115·7). Six pathogens were identified as the primary generators of burden: Streptococcus pneumoniae, Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Acinetobacter baumannii , and Pseudomonas aeruginosa . A substantial increase in the AMR burden due to S aureus was observed between 1990 (28 200 deaths [21 600–34 000]) and 2021 (49 500 deaths [43 100–56 200]); consequently, in 2021, methicillin-resistant S aureus was a leading pathogen–drug combination for most countries in the region for deaths and DALYs attributable to, and associated with AMR. Somalia had the highest age-standardised mortality rates in the region: for deaths attributable to and associated with AMR per 100 000 population in both 1990 and 2021; conversely, the country with the lowest burden in the EMR was Qatar. By 2050, the number of deaths attributable to AMR in region is forecasted to reach 187 000 (157 000–223 000) and deaths associated with AMR were projected to reach 752 000 (629 000–879 000). Interpretation Our study shows that bacterial AMR has been a serious public health threat in the EMR for more than 30 years, with a substantial fatal and non-fatal burden for priority bacterial pathogens and pathogen–drug combinations. The magnitude of this issue, future projects, and the inadequate response capacity in many countries underscore the need for more stringent regional leadership in this field. The insights gained from this study can direct targeted mitigation strategies for individual countries within the region, aiding in resource allocation and funding decisions, and emphasising the need for collaborative multisectoral endeavours among nations to address this issue. Funding Wellcome Trust, and the UK Department of Health and Social Care using aid funding managed by the Fleming Fund.

Open Access: Yes

DOI: 10.1016/S2468-2667(25)00201-4

Disease burden attributable to intimate partner violence against females and sexual violence against children in 204 countries and territories, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023

Amani Alansari Rana Kamal Abu Farha Haroon Ahmed Muayyad M. Ahmad Aanuoluwapo Adeyimika Afolabi Kamoru Ademola Adedokun Nurudeen A. Adegoke Lisa C. Adams Armita Abedi Mesfin Abebe Hubert Amu Anayochukwu Edward Anyasodor Aqeel Ahmad Williams Agyemang-Duah Mohmmad Minwer Alnaeem Muhammad Sohail Afzal Danish Ahmad Alemwork Abie Rotimi Felix Afolabi Saira Afzal Seyyed Shamsadin Athari Samar Abd ElHafeez Mehrunnisha Sharif Ahmed Ayman Ahmed Meriem Abdoun Zufishan Alam Lucas Guimarães Abreu Qorinah Estiningtyas Sakilah Adnani Bright Opoku Ahinkorah Haroon Ahmed Bilyaminu Abubakar Sawsan Abuhammad Meshack Achore Roberto Ariel Abeldaño Zuñiga Asma Ahmed Hasan Aalruz Olumide Abiodun Richard Gyan Aboagye Habeeb Omoponle Adewuyi Leticia Akua Adzigbli M. D.Abu Bashar Shahid Bashir Mohammad Mahdi Bastan Oluwatobi E. Adegbile Olumide Thomas Adeleke Miracle Ayomikun Adesina Hasan Aalruz Aleksandr Y. Aravkin Roberto Ariel Abeldaño Zuñiga Melaku Birhanu Alemu Hamid Alinejad Rokny Md Al-Mamun Joseph Uy Almazan Mohmmad Minwer Alnaeem Mohammad Sharif Ibrahim Alyahya Tarek Tawfik Amin Saeed Amini Sohrab Amiri Luisa S. Flor Jimoh Amzat Cory N. Spencer Jack Cagney Montaha Al-Iede Intima Alrimawi Saeid Anvari David B. Anderson Tahira Ashraf Boluwatife Stephen Anuoluwa Julie Alaere Atta Wondu Feyisa Balcha Gabriela Fernanda Gil Siddig Ibrahim Abdelwahab Yonas Abebe Babatope Oluwadamilare Adebiyi Jorge Arias de la Torre Benedetta Armocida Alejandra Arrieta Deepavalli Arumuganainar Shereen M. Aleidi Makinde Adebayo Adeniyi Fadwa Naji Alhalaiqa Oli Ahmed Bilal Aslam Prince Atorkey Elizabeth Oluwatoyin Akin-Odanye Wole Akosile Idorenyin Ubon Akpabio Rasmieh Mustafa Al-Amer Turki M. Alanzi Asma Ahmed Sachin R. Atre Abadi Hailay Atsbaha Madhu Sudhan Atteraya Ahmed Y. Azzam B. Sheeba Khlood K. Baghlaf Atif Amin Baig Jose Balmori-de-la-Miyar Soham Bandyopadhyay Manish Barik Suzanne Lyn Barker-Collo Wesam Taher Almagharbeh Azadeh Bashiri Najim Z. Alshahrani Yuni Asri Asma Ahmed

Publication Name: Lancet

Publication Date: 2026-01-03

Volume: 407

Issue: 10523

Page Range: 31-52

Description:

Background Violence against women and against children are human rights violations with lasting harms to survivors and societies at large. Intimate partner violence (IPV) and sexual violence against children (SVAC) are two major forms of such abuse. Despite their wide-reaching effects on individual and community health, these risk factors have not been adequately prioritised as key drivers of global health burden. Comprehensive x§and reliable estimates of the comparative health burden of IPV and SVAC are urgently needed to inform investments in prevention and support for survivors at both national and global levels. Methods We estimated the prevalence and attributable burden of IPV among females and SVAC among males and females for 204 countries and territories, by age and sex, from 1990 to 2023, as part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2023. We searched several global databases for data on self-reported exposure to IPV and SVAC and undertook a systematic review to identify the health outcomes associated with each of these risk factors. We modelled IPV and SVAC prevalence using spatiotemporal Gaussian process regression, applying data adjustments to account for measurement heterogeneity. We employed burden-of-proof methodology to estimate relative risks for outcomes associated with IPV and SVAC. These estimates informed the calculation of population attributable fractions, which were then used to quantify disability-adjusted life-years (DALYs) attributable to each risk factor. Findings Globally, in 2023, we estimated that 608 million (95% uncertainty interval 518–724) females aged 15 years and older had ever been exposed to IPV, and 1·01 billion (0·764–1·48) individuals aged 15 years and older had experienced sexual violence during childhood. 18·5 million (8·74–30·0) DALYs were attributed to IPV among females and 32·2 million (16·4–52·5) DALYs were attributed to SVAC among males and females in 2023. IPV and SVAC were among the top contributors to the global disease burden in 2023, particularly among females aged 15–49 years, ranking as the fourth and fifth leading risk factors, respectively, for DALYs in this group. Among the eight health outcomes found to be associated with IPV, anxiety disorders and major depressive disorder were the leading causes of IPV-attributed DALYs, accounting for 5·43 million (–1·25 to 14·6) and 3·96 million (1·71 to 6·92) DALYs in 2023, respectively. SVAC was associated with 14 health outcomes, including mental health disorder, substance use disorder, and chronic and infectious disease outcomes. Self-harm and schizophrenia were the leading causes of SVAC-attributed burden, with SVAC accounting for 6·71 million (2·00 to 12·7) DALYs due to self-harm and 4·15 million (–1·92 to 13·1) DALYs due to schizophrenia in 2023. Interpretation IPV and SVAC are substantial contributors to global health burden, and their health consequences span a variety of individual health outcomes. Importantly, mental health disorders account for the greatest share of disease burden among survivors. Investing in prevention of these avoidable risk factors has the potential to avert millions of DALYs and considerable premature mortality each year. Our findings represent strong evidence for global and national leaders to elevate IPV and SVAC among public health priorities. Sustained investments are needed to prevent IPV and SVAC and to implement interventions focused on supporting the complex social and health needs of survivors. Funding Gates Foundation.

Open Access: Yes

DOI: 10.1016/S0140-6736(25)02503-6