Not applicableStudy completedNCT04912700What this trial is testingThe Impact of Vaccination on Severity of Illness in COVID-19Who this might be right forCovid19 Corewell Health East 11,834
Not applicableLooking for participantsNCT06435403What this trial is testingSARS-CoV-2 Specific Antibody Responses and Impact for COVID-19 Disease in EthiopiaWho this might be right forSARS CoV 2 InfectionCOVID-19 BreakthroughCOVID-19 Recurrent Michael Hoelscher 1,000
Not applicableStudy completedNCT05020145What this trial is testingCOVID-19 Vaccination and Breakthrough Infections Among Persons With Immunocompromising Conditions in the United StatesWho this might be right forImmunocompromisedImmunosuppressedCovid-19+3 more Pfizer 1,277,747
Testing effectiveness (Phase 2)UnknownNCT05132855What this trial is testingThe Immune Response of Heterologous Boost Third Dose of mRNA and Protein COVID-19 VaccineWho this might be right forCOVID-19Breakthrough Infection Chang Gung Memorial Hospital 340
Not applicableStudy completedNCT05392075What this trial is testingCOVID-19 Breakthrough Infection in Fully Vaccinated People and in People Who Received a Booster DoseWho this might be right forCOVID-19 PneumoniaCOVID-19 Methodist Health System 100
Not applicableUnknownNCT05033834What this trial is testingCovid-19 Infection in After VaccinationWho this might be right forCovid19 Assiut University 100
Not applicableStudy completedNCT05057936What this trial is testingAntibody After COVID-19 VaccinationWho this might be right forCovid19Breakthrough InfectionCKD+2 more Bangkok Metropolitan Administration Medical College and Vajira Hospital 140
Not applicableStudy completedNCT05222139What this trial is testingMonitoring COVID-19 Vaccination Response in Fragile PopulationsWho this might be right forSARS CoV 2 InfectionVaccination; InfectionBreakthrough Infection University of Bologna 8,894
Large-scale testing (Phase 3)Study completedNCT05517642What this trial is testingIH Convidecia as Second Booster Dose Against Breakthrough InfectionsWho this might be right forCOVID-19 CanSino Biologics Inc. 540
Not applicableActive Not RecruitingNCT06654973What this trial is testingSingapore SARS-CoV-2 Human Challenge StudyWho this might be right forCOVID 19 Tan Tock Seng Hospital 20