I thought they were naming the variants in Greek alphabetical order….
Since when did D come before L
First case of Lambda variant August 2020
https://thehill.com/changing-america/well-being/prevention-cures/565487-what-you-should-know-about-the-lambda
First case of Delta variant December 2020
https://www.yalemedicine.org/news/5-things-to-know-delta-variant-covid
The Greek Alphabet
https://web.mit.edu › jmorzins › wwwThe Greek Alphabet - MIT