This study is testing a new type of COVID-19 vaccine called mRNA-1283, also known as mNEXSPIKE®. The goal is to see if this vaccine is safe and helps the body fight off new versions of the virus. People who can join the study are either 65 years or older, or between 12 to 64 years with certain health risks that make COVID-19 more dangerous for them. If you're interested, you should not have had COVID-19 recently and should not have recently been vaccinated against COVID-19.
- The study involves receiving a new COVID-19 vaccine and follow-up visits.
- Participants must use birth control if they can become pregnant.
- Participants should not have had other vaccines recently, except the flu shot.
Before joining, participants will have a health check to ensure they meet all the study rules. This study helps us learn more about how vaccines can protect us from different COVID-19 variants.