New COVID vaccine studied alongside flu shot in adults
NCT ID NCT06279871
First seen Nov 01, 2025 · Last updated May 16, 2026 · Updated 21 times
Summary
This study tested a new type of COVID-19 vaccine (ARCT-2303) in over 1,500 adults who had already received a COVID-19 vaccine. Some participants got the COVID vaccine and the flu shot at the same time, while others got the COVID vaccine alone. The goal was to see how well the vaccine boosted immunity and whether it was safe when given with the flu vaccine.
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This is a summary of
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Australian Clinical Research Network (ACRN)
Sydney, New South Wales, Australia
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Austrials - St. Leonards
Sydney, New South Wales, Australia
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Austrials -Sunshine
Melbourne, Victoria, Australia
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CMAX
Adelaide, South Australia, Australia
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Clinitrials - Mount Site
Perth, Western Australia, Australia
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Clínica San Agustín
San José, Costa Rica
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Deposito de Medicamentos de Investigación Cousin Agustín (DEMEDICA)
San Pedro Sula, Honduras
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Emeritus Research Melbourne
Melbourne, Victoria, Australia
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Emeritus Research Sydney
Sydney, New South Wales, Australia
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Far Eastern University - Nicanor R. M Foundation
Quezon City, Philippines
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Griffith University Clinical Trials Unit
Sydney, New South Wales, Australia
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IICIMED
San José, Costa Rica
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Inversiones en Investigación Médica S.A (INVERIME)
Tegucigalpa, Honduras
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Northern Beaches Clinical Research - Walski
Sydney, New South Wales, Australia
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Nucleus Network
Melbourne, Victoria, Australia
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Nucleus Network Brisbane (Q-Pharm)
Brisbane, Queensland, Australia
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Organización y centro de investigación clínica Ochoa (OCINCO)
Comayagua, Honduras
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Paratus Clinical Blacktown
Sydney, New South Wales, Australia
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Paratus Clinical Brisbane
Brisbane, Queensland, Australia
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Paratus Clinical Canberra
Canberra, Australian Capital Territory, Australia
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Paratus Clinical Central Coast
Central Coast, New South Wales, Australia
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Sutherland Shire Clinical Research - Walski
Miranda, New South Wales, Australia
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The Peter Doherty Institute for Infection and Immunity
Melbourne, Victoria, Australia
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Tropical Disease Foundation - Putatan Health Center
City of Muntinlupa, Philippines
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USC Morayfield
Morayfield, Queensland, Australia
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USC Sippy Down
Sunshine Coast, Queensland, Australia
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USC Southbank
Brisbane, Queensland, Australia
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Veritus Research
Melbourne, Victoria, Australia
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Wollongong Clinical Research
Wollongong, New South Wales, Australia
Conditions
Explore the condition pages connected to this study.