> If our immune systems are generally stronger, it could be that pandemics disappear, because the pathogen can't spread fast enough. That's not how viral genet

> If our immune systems are generally stronger, it could be that pandemics disappear, because the pathogen can't spread fast enough. That's not how viral genetic evolution or our immune systems work. R0 isn't typically effected by the strength of a population's immune systems, but the severity of symptoms is. That's because the most infectious time is during initial viral replication and shedding, before your immune system has scaled its response (which takes time) enough to decrease viral load. If everyone in the world had super immune systems, COVID would have still been a pandemic, but we would have had fewer deaths.