Smokers' immune cells under the microscope in COVID-19 study
NCT ID NCT04403386
First seen Oct 31, 2025 · Last updated May 21, 2026 · Updated 35 times
Summary
This study looked at how smoking changes immune cells and whether those changes make smokers more vulnerable to severe COVID-19. Researchers followed 132 healthy smokers and non-smokers aged 30-55 for up to 6 months, taking blood, saliva, and nasal swabs to track infections and immune responses. No treatments were tested; the goal was to gather information to better understand the link between smoking, immunity, and COVID-19.
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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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Locations
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NIEHS Clinical Research Unit (CRU)
Research Triangle Park, North Carolina, 27709, United States
Conditions
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