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See the list of featured NIAID clinical trials below or view the complete list of NIAID studies recruiting participants on ClinicalTrials.gov.

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Coronaviruses
Flu (Influenza)
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Coronaviruses and Flu (Influenza)

Natural History of Systemic and Nasal Mucosal Immunity to Influenza and SARS-CoV-2 in Adults After Vaccination

Are you an NIH staff member? If you have some time and have an interest in helping researchers make discoveries about COVID-19 and influenza, we need you!

We are interested in learning about long-term immunity in people who receive COVID-19 and/or flu vaccines.

Study of the Immune Response to the Seasonal Influenza Vaccine and How Previous Infection With SARS-CoV-2 May Change That Response

This study evaluates the response of the immune system, the part of the body that helps fight infections, to the seasonal influenza vaccine in healthy individuals and also investigates whether prior SARS-CoV-2 infection may change that response.