The problem here is that the number of cases at the moment are still vastly "delta" cases, and they are relatively flat, but within that number, "if" the new variant is doubling every 2 days, it goes 6, 12, 25, 50, 100, 200, 400, 800, 1600, 3000, 6000, 12000, 25000, 50000, 100000, in 15 days, and we only knew about this variant really about 12 days ago (yet is was likely already here), and as it was at about 6 at that point, the new variant is currently still in the background noise of delta, but it won't be for much longer if the scientists are correct.
That is just case numbers, and we have no way of knowing yet how many are going to end up in hospital, which could be 7 days behind that, or dead, maybe another 14 days behind that, or how good the vaccines will prove against, I think much of the "news" about that is still guess work, but its encouraging that SA seem to think there hasn't been a major surge in hospitalisations, whare vaccinations are well below those here.