| Not Yet Recruiting | R21/MM Dosing, Presentations, and Preservatives NCT07194668 | University of Oxford | Phase 4 |
| Not Yet Recruiting | Immunogenicity and Safety Following In-House Recombinant Hepatitis B Vaccine in Indonesian Population (Phase I NCT05482295 | PT Bio Farma | Phase 3 |
| Not Yet Recruiting | Safety and Immunogenicity of PCV-LITE, a Low-dose of Pneumococcal Conjugate Vaccine With LiteVax Adjuvant NCT06986239 | LiteVax BV | Phase 1 |
| Not Yet Recruiting | Optimal Timing of Hepatitis B Vaccination After Transplants NCT06888479 | Institute of Hematology & Blood Diseases Hospital, China | Phase 3 |
| Not Yet Recruiting | Phase I/II, Open Label, Randomized, Safety and Immunogenicity Following DTwP-Hepatitis B-Hib-IPV Vaccine (Bio NCT06690515 | PT Bio Farma | Phase 1 / Phase 2 |
| Withdrawn | Safety and Immunogenicity of HPV Vaccine Administered Intradermally and Intramuscularly Via Needle-Free Inject NCT06142461 | PharmaJet, Inc. | Phase 2 |
| Unknown | The Non-Specific Immunological Effects of Providing Oral Polio Vaccine to Seniors in Guinea-Bissau NCT06266754 | Bandim Health Project | Phase 4 |
| Recruiting | Intradermal Influenza Vaccination NCT06067555 | Yale University | EARLY_Phase 1 |
| Unknown | Safety, Reactogenicity and Immunogenicity of a Venezuelan Equine Encephalitis DNA Vaccine Candidate Administer NCT06002503 | PharmaJet, Inc. | Phase 1 |
| Unknown | Immunogenicity of Concomitant Administration of COVID-19 Vaccines With Influenza Vaccines NCT06091410 | Catholic Kwandong University | Phase 4 |
| Recruiting | B. Infantis Supplementation to Improve Immunity in Infants Exposed to HIV NCT05923333 | University of Cape Town | N/A |
| Unknown | Immunogenicity and Reactogenicity of the Beta-variant Recombinant Protein Booster Vaccine (VidPrevtyn Beta, Sa NCT05749926 | Assistance Publique - Hôpitaux de Paris | Phase 3 |
| Unknown | Immunogenicity, Reactogenicity of Shingrix in SLE NCT06001606 | Seoul National University Hospital | Phase 3 |
| Unknown | Immunogenicity and Safety of DTaP or DT Vaccine in 6 Year Old Children NCT05870618 | Zhejiang Provincial Center for Disease Control and Prevention | Phase 4 |
| Unknown | Immunogenicity and Safety of DTaP or DT Vaccine in 6 Year Old Children ( DTaP/DT ) NCT05870631 | Zhejiang Provincial Center for Disease Control and Prevention | Phase 4 |
| Active Not Recruiting | Long COVID and Its Associations With Health Outcomes in Older Adults NCT05825651 | Peking University | — |
| Unknown | A Comparison of Safety and Immunogenicity of Rabies Pre Exposure Prophylaxis Regimen Between Gvt of India Appr NCT06066294 | Kempegowda Institute of Medical Sciences, Bangalore | Phase 3 |
| Completed | Study to Evaluate Eupolio(IPV)'s Safety, Long-term Protective Effect and Boosting Effect of One Booster Dose i NCT05431933 | LG Chem | Phase 3 |
| Unknown | Phase-I Study to Evaluate the Safety and Immunogenicity of a Prophylactic pDNA Vaccine Candidate Against COVID NCT05171946 | Iman Almansour | Phase 1 |
| Completed | Modification of the COVID-19 Vaccine Response by an Intervention on the Intestinal Flora NCT05195151 | Université de Sherbrooke | N/A |
| Completed | Infant Pain During Vaccination and Maternal Anxiety NCT05598372 | Ataturk University | N/A |
| Completed | Safety and Immunogenicity of SARS-CoV-2 Protein Subunit Recombinant Vaccine in Healthy Children NCT05546502 | PT Bio Farma | Phase 3 |
| Completed | A Study to Prove Non-inferior Immunogenicity of Grippol Quadrivalent Compared to Grippol Plus NCT06385821 | NPO Petrovax | Phase 3 |
| Completed | Improving Vaccination in Older Adults by Inducing Autophagy With Spermidine NCT05421546 | University of Oxford | N/A |
| Active Not Recruiting | Understanding Poor Vaccine Responses to Hepatitis B Vaccination NCT04674462 | NYU Langone Health | Phase 4 |
| Unknown | Evaluation of the Immunogenicity and Safety of Ad26.COV2.S's COVID-19 Vaccine NCT05409261 | ANRS, Emerging Infectious Diseases | Phase 2 |
| Unknown | The Immunogenicity and Safety Following a Heterologous Booster Dose of Recombinant SARS-CoV-2 Vaccine LYB001 NCT05928455 | Guangzhou Patronus Biotech Co., Ltd. | EARLY_Phase 1 |
| Unknown | Determining Reactogenicity and Immunogenicity of Delayed COVID-19 Vaccine Schedule in Children NCT05329064 | KK Women's and Children's Hospital | Phase 4 |
| Unknown | National Vaccine Adverse Event Reporting Survey and Etiology NCT05095844 | Neuroganics LLC | — |
| Unknown | Safety and Immunogenicity of Prime-boost Vaccination of SARS-CoV-2 in Patients With Cancer NCT05273541 | Beijing 302 Hospital | Phase 1 / Phase 2 |
| Unknown | Safety and Immunogenicity of COVID-19 Vaccine Booster in Patients With Liver Diseases NCT05204602 | Huashan Hospital | — |
| Unknown | UNAIR Inactivated COVID-19 Vaccine NCT05226429 | Dr. Soetomo General Hospital | Phase 1 / Phase 2 |
| Completed | Investigating COVID-19 Vaccine Immunity in Children in the Melbourne Infant Study of BCG for Allergy and Infec NCT05168709 | Murdoch Childrens Research Institute | Phase 4 |
| Unknown | Tolerability, Safety and Immunogenicity Trial of the Flu-M Tetra Vaccine in Children NCT05739474 | St. Petersburg Research Institute of Vaccines and Sera | Phase 3 |
| Completed | The BOOSTED (Booster Options Or Switching Tested for Effectiveness and Downsides Study) Trial (COVID-19) NCT05268185 | University of California, San Francisco | N/A |
| Unknown | Booster Effect of mRNA Vaccine on Antibody Response for SARS-CoV-2 After Complete Vaccination With Sinos NCT05213455 | Lahore General Hospital | — |
| Unknown | Immunogenicity and Reactogenicity Following a Booster Dose of COVID-19 mRNA Vaccine (Pfizer-BioNtech) and Two NCT05124171 | Assistance Publique - Hôpitaux de Paris | Phase 3 |
| Unknown | Immunogenicity Against SARS-CoV-2 in COVID-19 Close Contacts NCT05094635 | University of Medicine and Pharmacy at Ho Chi Minh City | — |
| Completed | Effect of High-Dose Quadrivalent Influenza Vaccine (Efluelda®) Versus Standard-Dose (QIV-SD), in Subjects 65 Y NCT05154383 | Centre Hospitalier Annecy Genevois | Phase 4 |
| Unknown | Evaluation of Inactivated Vaccine in Healthy Adults Against Coronavirus Disease of 2019 (COVID-19) NCT05128721 | National Research Centre, Egypt | Phase 1 |
| Unknown | A Real-world Study to Evaluate the Safety and Immunogenicity of a Third-dose Booster After Two Doses of an Ina NCT05493917 | Huashan Hospital | — |
| Unknown | Evaluation of Intradermal Hepatitis B Vaccine After IMIQUIMOD's Application, in Cirrhotics Who Did Not Respond NCT05028322 | Central Hospital, Nancy, France | Phase 2 |
| Completed | The Epidemiology, Management and Comorbidities in Alopecia Areata in Czech Republic NCT05098600 | Faculty Hospital Kralovske Vinohrady | — |
| Completed | One or Two Week Methotrexate Discontinuation on Efficacy of Influenza Vaccination in Rheumatoid Arthritis. NCT05069714 | Seoul National University Hospital | Phase 3 |
| Completed | COVID19 Vaccine in SOT Adult Recipients NCT05116748 | Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico | — |
| Completed | SARS-CoV-2 (Covid-19) RBD Antibody in My Duc Hospital Healthcare Workers NCT05057910 | Mỹ Đức Hospital | — |
| Completed | Allergy and COVID-19 Vaccines NCT05028257 | Assistance Publique - Hôpitaux de Paris | Phase 3 |
| Completed | FDG (Fluorodeoxyglucose) Findings After COVID-19 Vaccination NCT05270967 | Kocaeli University | — |
| Completed | SARS-CoV-2 Antibodies and Virus Neutralisation in a Cohort Vaccinted Against COVID-19 NCT04979871 | University of Zurich | — |
| Completed | Assessment of the Immunization Levels Against Sars-Cov2 Virus in Subjects Who Have Received EU-approved COVID- NCT04954651 | University of Patras | — |
| Unknown | Pregnant and Lactating Individuals & Newborns COVID-19 Vaccination Prospective Cohort Study NCT05115617 | Ottawa Hospital Research Institute | — |
| Completed | Antibody Response and Longevity Post SARS-CoV-2 Vaccine (SARS-AB) NCT05515081 | IRCCS San Camillo, Venezia, Italy | N/A |
| Completed | Myocardial Injury and Dysfunction Associated With COVID-19 Vaccination NCT05359250 | University of Colorado, Denver | — |
| Completed | Effectiveness and Safety of the COVID-19 Vaccination for Patients With Liver Disease (CHESS2101) NCT04883177 | Hepatopancreatobiliary Surgery Institute of Gansu Province | — |
| Completed | Protective Antibody Level After COVID-19 Vaccination Among Patients Under Hemodialysis NCT04871945 | Hanyang University Seoul Hospital | — |
| Unknown | (VIII): The Eight Study and Immunologic Response Sub-study NCT05237024 | physIQ, Inc. | — |
| Completed | Evaluation of the Effect of Coronavac Vaccine (Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2 Vac NCT04854408 | Kanuni Sultan Suleyman Training and Research Hospital | — |
| Completed | Post COVID-19 Vaccination Analysis in Healthcare Worker Recipients NCT04922944 | Huntington Memorial Hospital | — |
| Unknown | Seroprevalence of Neutralizing Antibodies Against Japanese Encephalitis Virus Among 6 Years Old Children With NCT04817917 | Zhejiang Provincial Center for Disease Control and Prevention | Phase 4 |
| Completed | Immunization of 7 Different Vaccines Against SARS-COV-2 Across 4 Countries. NCT05228912 | Hospital Clinica Nova | — |
| Unknown | Assessment of Immune Response After Vaccination Against COVID-19 in Patients Treated With Renal Replacement Th NCT04905862 | Medical University of Gdansk | — |
| Completed | Effectiveness of Trivalent Influenza Vaccine (TIV) in Type 2 Diabetes Mellitus (T2DM) Patients With and Withou NCT06252051 | Universitas Padjadjaran | Phase 4 |
| Completed | Immunogenicity and Safety of the Booster Dose of Polio Vaccine With Different Primary Sequential Schedules in NCT04576910 | Zhejiang Provincial Center for Disease Control and Prevention | Phase 4 |
| Completed | Efficacy and Tolerability of ABBC1 in Volunteers Receiving the Influenza or Covid-19 Vaccine NCT04798677 | AB Biotek | N/A |
| Completed | Tolerability, Safety and Immunogenicity Trial of the Flu-M Quadro, Tetravalent Inactivated Split Influenza Vac NCT05869201 | St. Petersburg Research Institute of Vaccines and Sera | Phase 2 / Phase 3 |
| Active Not Recruiting | Effectiveness and Tolerability of Influenza Vaccine in Patients at Risk for Severe and Complicated Influenza NCT06286488 | Medical University of Warsaw | Phase 4 |
| Unknown | Evaluation of Immunoprotection Provided by Hepatitis B Vaccine After Birth in Healthy Children NCT04439435 | Children's Hospital of Chongqing Medical University | — |
| Unknown | A Trial For The Study of Falciparum Malaria Protein 014 Administered Via Intramuscular Injection in Healthy Ad NCT04296279 | U.S. Army Medical Research and Development Command | Phase 1 |
| Unknown | A Trial For The Study of Falciparum Malaria Protein 013 Administered Via Intramuscular Injection in Healthy Ad NCT04268420 | U.S. Army Medical Research and Development Command | Phase 1 |
| Completed | A Bridging Study of the SYN023 on Healthy Adult Subjects NCT04495569 | Synermore Biologics (Suzhou) Co., Ltd. | Phase 1 / Phase 2 |
| Completed | Kinetics of the Immune Response to Inactivated Influenza Vaccine in Healthy Adults NCT03743688 | Vanderbilt University Medical Center | — |
| Completed | Safety of LAIV4 in Children With Asthma NCT03600428 | Vanderbilt University Medical Center | Phase 4 |
| Unknown | Immunogenicity of Co-administered Oral Polio Vaccine and Oral Cholera Vaccine NCT03581734 | International Centre for Diarrhoeal Disease Research, Bangladesh | Phase 3 |
| Completed | Comparing Morbidity and Mortality Effects of Two Different Strains of BCG NCT03400878 | Bandim Health Project | Phase 4 |
| Unknown | Non-specific Effects of Vaccination on Mortality and Morbidity NCT03176719 | Radboud University Medical Center | — |
| Completed | A Prospective Study of HBV Immunity and HBV Vaccination in Patients With NAFLD in Canada NCT02985450 | University of Calgary | — |
| Completed | Study on New Strategies for Hepatitis B Virus Immunization NCT06515938 | Wu Jiang | N/A |