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How Long Does Mrna Last In The Body Covid Vaccine. mRNA vaccines do not remain in the body for long periods of time. Once the mRNA has been used to create the viral proteins that stimulate an immune response, it is broken down and eliminated by

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How Long Do Vaccines Last In Your Body. The duration of immunity provided by COVID-19 vaccines can vary depending on the specific vaccine and the person’s immune response. However, studies have shown that COVID-19 vaccines provide strong protection against symptomatic COVID-19 for at least several months.