The numerical mistake Gruber points out is definitely a howler, but I’m not sure characterizing all and any opposition to COVID boosters as “nonsensical” is fair. The WHO itself says:

>In a period of continued global vaccine supply shortage equity considerations at country, regional and global level remain an essential consideration to assure vaccination of high priority groups in every country. Improving coverage of the primary vaccination series should be prioritized over booster vaccination.

https://www.who.int/news/item/04-10-2021-interim-statement-o...