With the Omicron CoVid variant that has hit the news comes a bit of an understanding about the Greek alphabet. The strains so far have been called after Greek letters - the biggest up until now being the Delta variant. A new strain coming out of South Africa was originally called NU... until it was decided that was confusing ... so they went to the next letter in the Greek alphabet - XI... and decided that wouldn't do because it was such a common surname in China. They went to the next letter ... Omicron. But this presents a bit of a puzzle for those who have gone to have a look at the Greek alphabet because Xu does not follow immediately after Delta... that would be Epsilon. So why didn't the folk who decide such things choose Epsilon or any of the other letters between that and Nu. It would have been clearer ... Zeta, Eta, Theta, Iota, Kappa, Lambda or Mu would have done ... maybe.

Oops, just as well there is this thing called the internet.  Another look at the Greek alphabet naming convention shows that there are indeed CoVid variants named after the letters between (and including) Epsilon and Mu - but nothing much seems to have come of those (mentioned an article I read).

 It was reassuring that others were also noting the link between CoVid and the Greek alphabet ...