> From what I've read, the possibility is higher than some other random virus popping up at this moment in time.
I've read literally nothing credible that suggests that immune escape will ever be complete.
There are people who are "concerned" or "worried" about it or will argue that "we can't say"
But they're basically the same people who were arguing that the vacccines that we were producing that produced strong neutralizing titers might not work.
Or that vaccinated people might transmit the virus just as strongly as unvaccinated superspreaders, even though they have reduced symptoms and lower viral loads and we know that the household attack rate of fully asymptomatic disease is lower by nearly an order of magnitude.
The "well, we haven't proven it can't, so we have to assume the coronavirus could assemble and detonate a nuclear warhead in an American city" people have been solidly fucking wrong for the past 12 months.
They had a brief glimpse of correctness at the start of it all when people thought it would go away relatively quietly like SARS-1 + MERS. But those people were probably all the ones looking at the early ~20% case fatality rate and assuming that 20% of the coworkers were going to die.
And it isn't happening, and the messaging is horrible, and there's a cost to worrying about the literal worst case imaginable. It doesn't make you smart to consider literally all the possibilities, it gets in the way.