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TrialConditionsStatusPhaseUpdatedMore infoNCT ID
Real-world Effectiveness, Safety & Immunogenicity of Chikungunya Vaccination: Ambispective Study in Reunion & French GuianaAlphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseRecruitingPhase 42026-09-28NCT06928753
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
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
Antibody Persistence And Long Term Safety Of A Chikungunya Virus Vaccine (VLA1553)Alphavirus infectious disease, Infections, Mosquito-Borne Diseases, RNA Virus Infections, Togaviridae infectious disease, arbovirus infection, chikungunya, vector-borne disease, viral infectious diseaseActive, not recruitingPhase 32026-07-09NCT04838444
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