This study aims to understand how the flu and COVID-19 vaccines work in healthy people. Participants in this study will be given either a flu or COVID vaccine, or a mix of both, through one shot in the arm. The study lasts for about 6 months and requires at least 4 visits to the study site. To join, you must be 18 years or older and in good health, as decided by medical professionals. You cannot participate if you've had any flu or COVID vaccines or antivirals like Tamiflu within about 5-6 months before starting the study.
- Duration: Participation is approximately 6 months.
- Visits: At least 4 visits to the study site are needed.
- Shots Provided: Only one shot given, either flu, COVID, or a mix.