**A Study to Learn About How the Flu and COVID-19 Vaccines Act in Healthy People**
This study aims to see how flu and COVID-19 vaccines work when given alone or together. It seeks healthy adults aged 18 or older. Participants will receive one shot in their arm, which might be a flu vaccine, a COVID-19 vaccine, or a combination of both. The study lasts about 6 months, requiring at least 4 visits to the study site.
**Key Points:**
- **Duration**: The study lasts about 6 months.
- **Visits Required**: At least 4 visits to the study site.
- **Eligibility**: Participants must be healthy and 18 or older. Must not have had recent vaccines or antiviral treatments.
Participants should be aware that they must not have received any flu or COVID-19 vaccines or antiviral treatments within the specified time before joining. For more eligibility details, contact the study team.
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