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by pazimzadeh 659 days ago
When a virus replicates inside your cells, it sets off alarms that as a result of sensing of viral nucleic acid signatures in your cells (i.e. MAVS https://en.wikipedia.org/wiki/Mitochondrial_antiviral-signal...). A vaccine, unless it is a live attenuated vaccine (these are rare) does not set off the same alarms since you don't actually get viral nucleic acids in your cells.