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pearsch's avatar

Merriam Webster...

A tool of the [DS].

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Tim's avatar

FYI - at the bottom of the CDC's webpage (https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/mrna.html), under "More Information," they have a link titled "How Long Do mRNA and Spike Proteins Last in the Body?" which takes you to the UNMC Nebraska Medicine website, which still makes the same claim regarding the transitory presence of mRNA: https://www.nebraskamed.com/COVID/where-mrna-vaccines-and-spike-proteins-go

How long mRNA lasts in the body

The Pfizer and Moderna vaccines work by introducing mRNA (messenger RNA) into your muscle cells. The cells make copies of the spike protein and the mRNA is quickly degraded (within a few days). The cell breaks the mRNA up into small harmless pieces. mRNA is very fragile; that's one reason why mRNA vaccines must be so carefully preserved at very low temperatures.

How long spike proteins last in the body

The Infectious Disease Society of America (IDSA) estimates that the spike proteins that were generated by COVID-19 vaccines last up to a few weeks, like other proteins made by the body. The immune system quickly identifies, attacks and destroys the spike proteins because it recognizes them as not part of you. This "learning the enemy" process is how the immune system figures out how to defeat the real coronavirus. It remembers what it saw and when you are exposed to coronavirus in the future it can rapidly mount an effective immune response.

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