Don't forget reverse transcription into free-floating DNA. That's much more stable and can last a long time, and it was confirmed in a lab back in 2021 or 2022 that our liver cells are capable of doing it with the Pfizer mRNA covid vaccine.
There was another study last year on long covid that found some vaccine-specific spike proteins persisting weeks or months after they should have degraded/been removed by the immune system, but IIRC they didn't find a reason why.
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Don't forget reverse transcription into free-floating DNA. That's much more stable and can last a long time, and it was confirmed in a lab back in 2021 or 2022 that our liver cells are capable of doing it with the Pfizer mRNA covid vaccine.
There was another study last year on long covid that found some vaccine-specific spike proteins persisting weeks or months after they should have degraded/been removed by the immune system, but IIRC they didn't find a reason why.