So they can design a new vaccine in a short time, test it in a few months, but has anyone been working on large scale production for new vaccines? Do we still

So they can design a new vaccine in a short time, test it in a few months, but has anyone been working on large scale production for new vaccines? Do we still need to be making the old vaccines while also ramping up the new ones if we need them (the old virus will still be around)? We already don't have enough vaccine for the world yet. Seems like even if we do have the capacity to manufacture a new vaccine we may not have the vials, syringes, and people needed to administer it, especially if China and India decide to close their borders and vaccinate their own populations first. There have not been many news reports on the scale of preparations for a possible new variant that completely breaks through the current vaccines. I've only heard of a $100M attempt to reverse engineer the Moderna vaccine in Africa as part of a manufacturing capacity build up. Would it take yet another two years to roll out a new vaccine to the world, with corresponding lock downs and supply chain problems? Even if it only took a year that would still be a significant impact on the world. It's good that drug companies are working on this initial step, however by itself it is not enough.