Global vaccine study reveals real-world immune response
NCT ID NCT05096091
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at adults who received a COVID-19 vaccine through local programs in 7 countries. Researchers measured the immune response and how long protection lasts. About 5,400 people took part, providing blood and nose samples. The goal was to understand how well different vaccines work in various groups.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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5,399 people
The number who actually took part.
- Started
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Aug 2021
- Finished
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Aug 2025
- Lead sponsor
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A government research agency
The lead sponsor is the US National Institutes of Health.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Study participants will be people who are about to receive or have already received a Coronavirus disease 2019 (COVID-19) vaccine through the local vaccination program.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
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.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Hospital General Dr. Aurelio Valdivieso (HGAV)
Oaxaca City, Mexico
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Hospital General Dr. Manuel Gea Gonzalez (HGMGG)
Mexico City, Mexico
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Hospital Regional de Alta Especialidad "Ciudad Salud" HRAE-CS
Tapachula, Chiapas, Mexico
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Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran (INCMNSZ),
Mexico City, Mexico
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Instituto Nacional de Enfermedades Respiratorias (INER)
Mexico City, Mexico
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National Institute for Biomedical Research/Institut National de Recherche Biomédicale (INRB)
Gombe, Kinshasa City, Democratic Republic of the Congo
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National Institute of Health Research and Development (NIHRD), Ministry of Health, Republic of Jakarta - RSU Kabupaten Tangerang
Tangerang, Indonesia
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Onom Foundation and Liver Center
Ulaanbaatar, 17011, Mongolia
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Partnership for Clinical Research in Guinea/Partenariat de Recherche Clinique en Guinée (PREGUI)
Conakry, Guinea
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Partnership for Research in Vaccines and Infectious Diseases in Liberia (PREVAIL) - Duport Road Health Center
Monrovia, Liberia
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University Clinical Research Center (UCRC) University of Sciences, Techniques and Technologies of Bamako
Bamako, Mali
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Does COVID-19 hide in the gut? scientists probe stool for clues
- Blood samples and health records could reveal why some COVID-19 cases turn severe
- Home antibody tests put to the test: can you read your own COVID-19 result?
- Can lung ultrasound reveal COVID-19's signature in the lungs?
- When the immune system Can't fight back: tracking three respiratory viruses
- The household maze: how does COVID-19 move between family members?