Well, there's this... already answered
The mRNA only lasts a couple of days. Then it's gone. Likewise the Covid spike proteins generated are cleared out rapidly - as in the immune reaction to them. Then there's nothing left of the vaccine components. Much less 21 days later.
A negative Covid virus test might mean it was the Flu instead. Or the vaccinated immune system was hyper reactive to the virus, and responsible for the symptoms with a strong cytokine storm. With the virus unable to increase to high enough titers to be positive for a PCR test. As in eliciting a hyper immune response, and being eliminated rapidly. These mRNA vaccines are producing very high Ab titers, not usually seen in vaccinations. New territory.
It would be interesting to know if there are mass of unreported break through cases. Not reported, because they come and go rapidly with very mild symptoms in 18-24 hrs. Along with the Ab titers before/after (e.g. those being monitored in the clinical trials).
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