Thing is, when I was doing my PhD, we were reminded to actually pay attention to the questions we were being asked and discussions we were having, and not to head off on our own pet topic. The Boris Johnson school of answers, if you like.
I said: There are people who still think the vaccine is going to be rendered useless by a mega-variant that is going to pop up any day.
Cath Green says: The good news is that we also think it is unlikely that the virus can mutate in a way that keeps it functioning but makes our vaccine completely ineffective.
That's because a change in the spike protein – which allows the coronavirus to enter and infect human cells – that is radical enough to make our vaccine completely ineffective would also, almost certainly, be so extreme as to make the virus non-functional
You said: New variants! Resistance!
Scientists are normally careful about how they phrase things so as not to cause alarm. Normally.