That's a question that Ms. Finley would ask epidemiologists instead of the Opinion readers of the WSJ if she had any competence as a journalist. <a href="https://www.science.org/content/blog-post/vaccines-will-not-produce-worse-variants" rel="nofollow">https://www.science.org/content/blog-post/vaccines-will-not-...</a>
This <i>opinion</i> piece is written by an absolutely unqualified talking head, not an epidemiologist.<p>> Allysia Finley is a member of the Journal's Editorial Board. Ms. Finley joined The Wall Street Journal in 2009 after graduating from Stanford University with a bachelor’s degree in American Studies. During college, she edited the opinions section for The Stanford Review and wrote columns for The Orange County Register.<p>Lacking any science training whatsoever, she is less qualified to write this column than most HN readers.
This seems to be presenting an inverted fact. The places with higher vaccination have less variants, this is because most are insufficiently fit. There are less possibilities of hybrids (or complex evolutionary paths) if only the most significant strain is viable.