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International Study on COVID-19 Vaccine to Assess Immunogenicity, Reactogenicity and Efficacy (InVITE)

International Study on COVID-19 Vaccine to Assess Immunogenicity, Reactogenicity and Efficacy (InVITE)

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05096091
Acronym
InVITE
Enrollment
5399
Registered
2021-10-27
Start date
2021-08-16
Completion date
2025-08-19
Last updated
2025-12-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19

Keywords

SARS-CoV-2 Infection

Brief summary

InVITE is funded by NIAID and is conducted in multiple international sites (approximately 20 sites across 7 countries). This is a study of adults who receive locally available COVID-19 vaccines through local vaccination programs. Persons will be enrolled within one day (before or after) of receipt of a COVID-19 vaccine. The study will enroll participants who receive COVID-19 vaccination at local clinics and/or study sites.

Detailed description

This is a multicenter study of COVID-19 vaccine immunogenicity and durability, and breakthrough serious acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infections in people who receive a COVID-19 vaccine through their country's national vaccination programs. Participants will be enrolled upon signing the informed consent within a day of receipt of a COVID-19 vaccine (before or after). The study team will not be administering the vaccine; receipt of vaccine will be provided through each country's vaccine program. Blood specimens will be collected to measure the immune response to the vaccine. Participants may be asked to contact study staff at any time during the study for evaluation if they develop symptoms consistent with SARS-CoV-2 infection, at which time they will be counseled about the need for a medical evaluation that may include collection of an upper airway swab for diagnosis (and research) and a blood sample for research. Infections will be confirmed by molecular or antigen (Ag) testing at the time of symptoms, and swabs will be collected and stored for viral sequencing and analyses.

Interventions

None listed

Sponsors

Institut National de Recherche Biomédicale. Kinshasa, République Démocratique du Congo
CollaboratorOTHER
Partnership for Clinical Research in Guinea/Partenariat de Recherche Clinique en Guinée (PREGUI)
CollaboratorUNKNOWN
Partnership for Research on Ebola Virus in Liberia (PREVAIL)
CollaboratorNETWORK
University Clinical Research Center, Mali
CollaboratorOTHER
Onom Foundation and Liver Center
CollaboratorUNKNOWN
Mexican Emerging Infectious Diseases Clinical Research Network
CollaboratorNETWORK
Ina-Respond
CollaboratorOTHER
National Institute of Allergy and Infectious Diseases (NIAID)
Lead SponsorNIH

Study design

Observational model
ECOLOGIC_OR_COMMUNITY
Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* 18 years of age or older. * Ability to provide informed consent. * Enrollment within one day (before or after) of receipt of COVID-19 vaccine. * Willingness to be evaluated (including collection of blood and nasopharyngeal samples) during the prescribed study visits and/or during acute illness consistent with SARS-CoV-2 infection during the study period. * Willingness to allow storage of biological samples for research testing as outlined in this protocol.

Exclusion criteria

* Any acute or chronic condition that, in the opinion of the investigator, is a contraindication to participation in this study; for example, acute febrile illness. * Inability to comply with study visits.

Design outcomes

Primary

MeasureTime frameDescription
1. To characterize immunogenicity (by measurement of anti-Spike [S] antibody [Ab]) of available COVID-19 vaccines in the overall study population, in each of the countries and in defined subgroups2 monthsMeasured by amount of Anti-S Ab at 2 months after completion of vaccine regimen.

Secondary

MeasureTime frameDescription
Evaluate duration of immunogenicity1 day, 2 months, 10 monthsMeasured by Anti-S Ab at different specific timepoints
Evaluate immunogenicity in predefined subgroups (by age, body mass index [BMI], comorbidities, HIV, breakthrough infection, or evidence of prior infection with SARS-CoV-2).1 day, 2 months, 10 monthsMeasured by levels of Anti-S Ab in predefined subgroups.
Characterize virus causing breakthrough infections using viral genomic sequencing.1 dayMeasured from sequencing to characterize SARS-CoV-2 variants
Compare immunogenicity between different vaccines.2 monthsMeasured by Anti-S Ab levels at 2 months post-vaccine regimen
Evaluate infection rates after vaccination.1 dayMeasured by levels of anti-nucleocapsid Ab

Countries

Democratic Republic of the Congo, Guinea, Indonesia, Liberia, Mali, Mexico, Mongolia

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 3, 2026