I think that the jury is still out about this and the Omnichrom variant as we are still learning about the effects of this particular variant. There's a strong suggestion that Omnichrom is hitting children a quite a lot harder, this may, or may not be be a serious problem, but with the higher rate of spread and the faster level of transmission, we might not get much time to respond and the limited time it takes respond may catch us less prepared.
If there is going to be any nasty surprises, which we don't have time to react to and get our preparations in place, in sufficient time. General precausions such as taking a good multi vitamin tablet on a daily basis, a high does vitamin D tablet and a good diet will help to build up you natural immunity in general. It's not specifically aimed at just covid, but good immune health in general. Buying a few tins of foods to keep you going for a week, or two if you are fighting an infection, will also be a smart move.