Also, notice a few seconds later in the speech he says new variants are coming and things that are worse than the variants.
Remember, he know a lot of things that have not been made public.
That’s actually the entire reason behind the thrust, and is quite well known.
Covid doesn’t mutate in vaccinated people. But it does mutate in the unvaxxed.
The next mutation of concern might be one that evades all the vaccines and we would be back to ground zero.