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How do you know that the corona virus will not mutate? So far it's still not clear if corona will come back in the next years in a slighty different form. ...
Reword this to correct it.
Of course COVID-19 will mutate. It already has. Of course it will be around, basically forever.
Forever is so long. It will be around until the vaccine is going to be produced.
From that time and so on, it will not be here forever (not literally) as people will not be afraid of it and they will be cured when they will get sick. The point now is that people die if they get infected by the virus.
One more time, no, science will not find a magic cure, there will be no vaccine that causes you to never get the COVID-19. That's a false hope. There will come to be a "herd immunity".