  In 2022 new subvariants of Coronavirus appeared in South Africa, and spread
rapidly to other parts of the world. The effects of selective evolution on
increasing the already high contagiousness of CoV19 up to Omicron were
previously discussed with high accuracy using concepts new to molecular biology
(from mathematics and physics) that have been developed over the last few
decades. Here we discuss the new subvariants, and find novel features
successfully combining both improved flexibility and improved stability.
