| Not Yet Recruiting | Post-marketing Surveillance Study for the Safety of Efluelda Tetra Pre-filled Syringe. NCT06694025 | Sanofi | — |
| Withdrawn | The Dreamy Jet Study NCT06919198 | University of Wisconsin, Madison | Phase 1 |
| Recruiting | Description of the Immune Response to Yellow Fever Vaccination NCT06718127 | Institut Pasteur | N/A |
| Recruiting | Comparing Immune Response of 2 vs 3 HPV Doses (27-45 Years Old) NCT05672927 | The University of Texas Medical Branch, Galveston | Phase 4 |
| Unknown | The STOP-HPV Trial 5: Single Arm Evaluation of the Bundle NCT03609320 | University of California, Los Angeles | N/A |
| Recruiting | Adjuvant Effect of Physical Exercise on Immune Response to COVID-19 Vaccination and Interactions With Stress NCT05213000 | Iowa State University | N/A |
| Enrolling By Invitation | Pediatric Vaccinations NCT04936776 | NYU Langone Health | — |
| Completed | Comparing the Use of a Mobile App for Surveillance of Adverse Events Following Influenza Immunization to a Web NCT05794113 | The Ottawa Hospital | N/A |
| Completed | HPV Vaccination Study in Postpartum Women NCT04274153 | Johns Hopkins University | Phase 4 |
| Completed | FluPRINT Study: Characterisation of the Immune and Transcriptional Response to LAIV NCT04222595 | University of Oxford | N/A |
| Completed | GARDASIL 9: 3 Dose vs. 2 Dose With Delayed 3rd Dose NCT03943875 | The University of Texas Medical Branch, Galveston | Phase 4 |
| Completed | Assessing Barriers and Increasing Use of Immunization Registries in Pharmacies NCT03796585 | Auburn University | N/A |
| Unknown | Immunization Schedule Alert Platform NCT03705455 | Lifespan Healthcare Resource Limited | N/A |
| Completed | The STOP-HPV Trial 2: Performance Feedback Intervention NCT03599570 | University of California, Los Angeles | N/A |
| Withdrawn | The STOP-HPV Trial 6: Single Arm Evaluation of the Maintenance of the STOP-HPV Bundle NCT03609372 | University of California, Los Angeles | N/A |
| Unknown | The STOP-HPV Trial 4: Bundle Intervention NCT03609242 | University of California, Los Angeles | N/A |
| Completed | The STOP-HPV Trial 1: Communication Intervention NCT03599557 | University of California, Los Angeles | N/A |
| Unknown | The STOP-HPV Trial 3: Prompts Intervention NCT03599583 | University of California, Los Angeles | N/A |
| Completed | mHealth-Assisted Conditional Cash Transfers to Improve Timeliness of Vaccinations (D0271) NCT03252288 | Duke University | N/A |
| Completed | Safety and Efficacy of BK1310 Intramuscular Injection in Healthy Infants NCT03188692 | Tanabe Pharma Corporation | Phase 3 |
| Completed | State Immunization Information Systems to Improve HPV Vaccination Rates NCT02993965 | University of Colorado, Denver | N/A |
| Completed | PRIMM Trial (Phone Reminder for IMMunization) NCT02819895 | Children's Hospital of Philadelphia | N/A |
| Completed | Immunization Services Model for Adult Rate Improvement NCT02609035 | Pharmacy Quality Alliance | N/A |
| Completed | Effect of Infant Immunization on Procalcitonin Levels - A Pilot Study NCT04295694 | CAMC Health System | — |
| Recruiting | Influenza Immunization in Adults Over Age 75 NCT02200276 | Johns Hopkins University | N/A |
| Completed | Pertussis and Meningitis C Concomitant Vaccination in Adolescents NCT02526394 | Public Health England | Phase 4 |
| Completed | Comparison of Immunization Quality Improvement Dissemination Study NCT02432430 | Children's National Research Institute | N/A |
| Unknown | Testing Educational Materials in a Paediatric Setting NCT01713322 | University of Toronto | Phase 3 |
| Completed | Prenatal Education About Infant Immunization Pain Management NCT01707212 | University of Toronto | Phase 3 |
| Unknown | A Study of Two Injection Techniques to Reduce Pain in Infants Undergoing Immunization NCT01601197 | University of Toronto | Phase 3 |
| Completed | Music Therapy as Procedural Support for Young Children Undergoing Immunizations NCT01463176 | Florida State University | N/A |
| Completed | Study of Yili Mei Yi Tian Active Lactobacillus Drink to Improve Immunity and Digestive System NCT01677715 | Inner Mongolia Yili Industrial Group Co., Ltd | N/A |
| Completed | Study of TAK-816 in Healthy Infants NCT01379846 | Takeda | Phase 3 |
| Completed | Examining Adolescent Assessment, Feedback, Incentive, and Exchange (AFIX) in North Carolina NCT01544764 | University of North Carolina, Chapel Hill | N/A |
| Completed | Study of Yili Lactoferrin ShuHua Milk in the Improvement of Human Immunization NCT01677702 | Inner Mongolia Yili Industrial Group Co., Ltd | N/A |
| Completed | Study Evaluating a 13-valent Pneumococcal Conjugate Vaccine in Preterm Compared to Term Infants. NCT01193335 | Pfizer | Phase 4 |
| Completed | Study of Adolescent Immunization Recall Systems NCT01390363 | Boston Children's Hospital | N/A |
| Completed | Population Versus Practice-based Interventions to Increase Immunizations NCT01296906 | University of Colorado, Denver | N/A |
| Completed | Study Evaluating Antibody Response Of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) 24 Months After Toddle NCT01026038 | Pfizer | Phase 3 |
| Completed | Restricted Intravenous Fluid Regime Effects on Immunological Indicators of Elderly Patients Operated for Abdom NCT01399814 | Nanjing PLA General Hospital | Phase 3 |
| Completed | Trial to Reduce Alloimmunization to Platelets (TRAP) NCT00000589 | National Heart, Lung, and Blood Institute (NHLBI) | Phase 3 |
| Withdrawn | Assessment of Novel Pneumococcal Conjugate Vaccination Scheduled in UK Infants NCT02918708 | Public Health England | Phase 4 |