This study looks at how well new mRNA COVID-19 vaccines work. mRNA vaccines help the body recognize and fight the coronavirus. It focuses on people who have already had a COVID-19 shot before. They want to see if the vaccines protect against new strains of the virus.
Eligibility: You can join if you've had an mRNA COVID-19 vaccine before, and you can follow the study rules. Women who might get pregnant need to take a pregnancy test and use birth control during the study. Don't join if you've had COVID-19 recently, have a high fever, or have severe allergies to vaccines.
- You need to have had a previous mRNA COVID-19 vaccine.
- Women must take a pregnancy test and use birth control.
- You can't join if you have recent COVID-19 or severe allergies.
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