A bit like just because you have the flu it doesn't mean you won't get another variant of the flu. It is almost as if they are similar or some may say the same.
Out of interest has the huge wave of flu etc started this winter yet? I seem to remember last year there was none because of social distancing but this winter we would be hit with all sorts. Maybe the Omicron has scared all the others off.
It's all just history repeating. I remember this documentary from way back, which warns you have to be careful of saying omicron to often.