This study aims to better understand how your body's immune system responds to the influenza (flu) vaccine. Researchers are looking for 75 community-dwelling adults who need a standard flu shot. You will receive one intramuscular (into the muscle) dose of seasonal quadrivalent inactivated influenza vaccine. To see if the vaccine is successful, researchers will measure your influenza neutralizing antibody titers (levels of protective antibodies) between 21 and 42 days after vaccination. You cannot join if you have a fever, active cancer, are taking immunosuppressing medications, have donated blood recently, or have been vaccinated for flu in the past 6 months. The current recruitment status is unclear.

Study design

This is an interventional study with a planned enrollment of 75 participants. The phase of the study is not specified.

What's involved

You will receive one influenza vaccination. You will also have peripheral blood drawn at pre-defined intervals to study lymphocyte responses.

Compensation

Not stated in the trial record.

Follow-up

Your influenza neutralizing antibody titers will be measured between 21 and 42 days after vaccination.

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