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TrialConditionsStatusPhaseUpdatedMore infoNCT ID
Prospective Safety Cohort Study After VLA1553 Vaccination in Municipalities Selected for Participation in the VLA1553 Pilot Vaccination Strategy in BrazilAlphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseActive, not recruitingNot stated2026-07-21NCT07254702
Phase 3b Trial To Evaluate Safety And Immune Response (Superiority) of a Two-Dose Butantan-DV Regimen And The Standard Single Dose In Dengue-Naive Children/Adolescents and Immune Response (Non-inferiority) in a Manufacturing Facility Change (DEN-06-IB)Dengue Fever With Warning SignsNot yet recruitingPhase 32026-07-20NCT07712926
VLA1553-403 Pregnancy Surveillance StudyAlphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseEnrolling by invitationNot stated2026-07-20NCT07414524
Observational Study to Assess the Effectiveness of VLA1553 Vaccine in Preventing Chikungunya During a Pilot Vaccination Strategy in BrazilAlphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseEnrolling by invitationNot stated2026-07-17NCT07347002
Butantan-DV Vaccine in Elderly Populations (DEN-04-IB)Flaviviridae infectious disease, Flavivirus Infections, Infections, Mosquito-Borne Diseases, RNA Virus Infections, arbovirus infection, dengue disease, vector-borne disease, viral hemorrhagic fever, viral infectious diseaseRecruitingPhase 32026-07-16NCT06891950
Safety and Immunogenicity of the Monovalent Influenza Vaccine A (H5N8) (Inactivated, Fragmented and Adjuvanted) in Adults and Older AdultsInfections, RNA Virus Infections, avian influenza, bird disease, influenza, non-human animal disease, viral infectious diseaseRecruitingPhase 1 / Phase 22026-04-02NCT06842173
Assessment of Chikungunya Virus Seroprevalence Before VLA1553 Vaccination in the Municipalities Selected for Participation in the VLA1553 Pilot Vaccination Strategy in BrazilAlphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseActive, not recruitingNot stated2026-02-11NCT07163845