Can vaccine timing boost protection for the vulnerable?
NCT ID NCT06599658
First seen Mar 11, 2026 · Last updated May 01, 2026 · Updated 7 times
Summary
This study looks at the best way to give COVID-19 booster and flu shots to people with weakened immune systems, such as those with rheumatoid arthritis, HIV, or organ transplants. It will compare giving both vaccines at the same time versus one month apart, and also test if getting a COVID-19 booster every 3 months is better than every 6 months. The goal is to find the safest and most effective schedule to improve protection.
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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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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Centre hospitalier de l'Université de Montréal (CHUM)
RECRUITINGMontreal, Quebec, H2X 0C1, Canada
Contact Phone: •••-•••-•••• Email: •••••@•••••
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Maisonneuve -Rosemont Installation
RECRUITINGMontreal, Quebec, H1T2M4, Canada
Contact Phone: •••-•••-•••• Email: •••••@•••••
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Research Institute of McGill University Health Centre
RECRUITINGMontreal, Quebec, H4A 3J1, Canada
Contact Phone: •••-•••-•••• Email: •••••@•••••
Conditions
Explore the condition pages connected to this study.