| Active Not Recruiting | Predicting Vaccine Hesitancy Using Machine Learning NCT06988969 | University of Yalova | — |
| Recruiting | Improving Vaccine Acceptance Through EHR Integrated Patient- and Provider-Facing Decision Support NCT06482450 | Johns Hopkins Bloomberg School of Public Health | N/A |
| Recruiting | Active Health Education to Increase HPV Vaccine Coverage in Youth: A Stepped-wedge, Cluster, and Randomized Tr NCT06513494 | Hospital Israelita Albert Einstein | N/A |
| Recruiting | Vaccine Confidence Study Among Historically Marginalized Racial and Ethnic Groups NCT06639386 | Boston Medical Center | — |
| Not Yet Recruiting | A Survey of Acceptance and Factors Associated With Hesitancy Vaccination in Northeast Brazil NCT06675721 | Centro De Estudos E Pesquisas Em Molestias Infecciosas | — |
| Completed | Improving Vaccine Counseling Skills Among Residents Using Educational Modules and Standardized Patient Encount NCT06074237 | Corewell Health East | N/A |
| Active Not Recruiting | Supporting CHWs as Vaccine Educators: Impact of a Digital Training and Chatbot Intervention on Vaccination in NCT06237374 | Stanford University | N/A |
| Completed | COVID-19 Vaccination Willingness in Older Adults Based on Self-determination Theory NCT06575114 | Jing-Shan Deng | N/A |
| Recruiting | Vaccinations and People With Disabilities NCT05749419 | Hadassah Medical Organization | — |
| Completed | Exploring the Effect of Video Interventions on Intentions for Continued COVID-19 Vaccination NCT05808413 | Sir Mortimer B. Davis - Jewish General Hospital | N/A |
| Completed | Testing the Persuasiveness of Pro-inoculation Arguments NCT05804825 | University of Pennsylvania | N/A |
| Recruiting | Evaluating the Impact of Resource Navigators to Support LTC and RH Staff During and Beyond COVID-19 NCT05677997 | Unity Health Toronto | N/A |
| Unknown | The Motivational Interview Teqhnique in Pregnant Women Who Are Hesitant in Childhood Vaccines NCT05648513 | Balikesir University | N/A |
| Completed | Seasonal Influenza and Pneumococcal Vaccination in the Elderly NCT05661890 | Lokman Hekim University | — |
| Completed | Testing The Effectiveness Of Two Interventions To Reduce Vaccine Hesitancy Among Adolescents NCT06155877 | Centre National de la Recherche Scientifique, France | N/A |
| Withdrawn | Increasing COVID-19, Influenza, and Pneumonia Vaccine Uptake NCT04761692 | Charles Drew University of Medicine and Science | N/A |
| Completed | COVID-19 Vaccine Education at the Point of Testing to Increase Vaccine Uptake in Vulnerable Communities in SE NCT04939506 | Xavier University of Louisiana. | N/A |
| Completed | The Effect of Telehealth Service About Childhood Vaccines on Vaccine Attitudes and Vaccination NCT05713526 | Gozde AKSUCU | N/A |
| Completed | CATCH-UP Vaccines: Engaged Approaches to Testing in Community/Healthcare Settings for the Underserved (COVID-1 NCT05236270 | University of Oklahoma | N/A |
| Unknown | Assessing Knowledge, Beliefs and Attitudes Toward HPV Vaccination Among Parents in North West, Cameroon NCT05325138 | McMaster University | — |
| Completed | Use of Construal Level Theory to Inform Messaging to Increase Vaccination Against COVID-19 NCT04871776 | Brigham and Women's Hospital | N/A |
| Completed | Understanding and Overcoming the Racial/Ethnic Inequalities in COVID-19 Vaccination Acceptance NCT05238428 | University of Essex | N/A |
| Unknown | Effect of COVID-19 Pandemic on Vaccination Compliance NCT04618796 | Assiut University | — |
| Completed | Impact of LA-CEAL HALT COVID-19 Ambassador Program on Likelihood to Vaccinate NCT04930965 | Tulane University | N/A |
| Completed | Increasing Vaccine Uptake in Underresourced Public Housing Areas NCT04779138 | Charles Drew University of Medicine and Science | N/A |
| Unknown | COVID-19 Vaccine Hesitancy and Dental Faculty Staff Members in Egypt NCT05009043 | Mariam Ayman Amin Sharaf | — |
| Completed | Exploring Changes in COVID-19 Vaccination Intentions by Prompting Altruistic Motives Using a Video Interventio NCT04960228 | Zeev Rosberger | N/A |
| Completed | Project 2VIDA! COVID-19 Vaccine Intervention Delivery for Adults in Southern California NCT05022472 | Britt Skaathun | Phase 4 |
| Completed | Volatility and Heterogeneity of Vaccine Sentiments Means Continuous Monitoring is Needed When Measuring Messag NCT05499299 | The University of Hong Kong | N/A |
| Unknown | COVID-19 Vaccine Hesitancy Among African Americans NCT04801030 | Meharry Medical College | N/A |
| Unknown | Study on COVID-19 Vaccine Effectiveness Among Health Workers in Azerbaijan NCT05069454 | Public health and reforms Center of Ministry of Health | N/A |
| Completed | Health Communication to Influence COVID-19 Vaccination Intent and Message Propagation NCT05244356 | Clinical Research Centre, Malaysia | N/A |
| Withdrawn | Clinic-based HPV and COVID-19 Vaccine Promoting Intervention for AfAm Adolescents in Alabama NCT04604743 | University of Alabama at Birmingham | N/A |
| Unknown | VEText Message Framing and Covid-19 Vaccine Uptake Among at Risk Veterans NCT04805931 | VA Puget Sound Health Care System | N/A |
| Unknown | A Tailored, Health Communication Intervention for HPV Vaccine Hesitant Families NCT04380623 | Meharry Medical College | N/A |
| Completed | Development and Testing of ADEPT: A Parent Decision Support for Childhood Vaccinations NCT04496453 | Duke University | N/A |
| Completed | Promoting Altruism to Enhance Vaccine Acceptance NCT04568590 | Wake Forest University Health Sciences | N/A |
| Completed | An Online Intervention Promoting HPV Vaccination Among Chinese MSM NCT04815837 | Chinese University of Hong Kong | N/A |
| Terminated | Optimizing HPV Vaccine Introduction in Shanghai, China NCT03972813 | University of Michigan | N/A |
| Completed | Vaccine Hesitancy: A Survey of Pediatric Clinicians NCT01098825 | Children's Mercy Hospital Kansas City | — |