I have always regarded the BA.2 subvariant of Omicron and potentially more dangerous than BA.1 as it is quite different. Up until a week or so ago, BA.1 had generated 19 new subvariants BA.1.*, e.g. BA.1.1 and BA.1.14, and BA.1.17. Now BA.2 is developing new subvariants, like BA.2.1 and BA.2.3. They have appeared in South…