This study aims to understand how well the flu vaccine works in people who have had COVID-19. Researchers will give all participants a single flu shot and then measure their immune response (how their body fights off infection) one week and one month later. They are looking for adults and children aged 9 to 64 who have had COVID-19, including those with conditions like obesity, diabetes, chronic fatigue, or long-term COVID-19 symptoms. People who have not had COVID-19 can also join as a comparison group. The study is currently unclear on its recruitment status, but plans to enroll 230 participants.

Study design

This is an observational study planning to enroll 230 participants. All participants will receive a single flu shot.

What's involved

All participants will receive a single flu shot. Their immunity to the flu vaccine will be tested at one week and one month after the shot.

Compensation

Not stated in the trial record.

Follow-up

Participants will be followed for one month after receiving the flu vaccine to test their immunity.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.