> They might still be right; this is only a pre-print, only focused on one specific aspect of COVID and the effect size is small. There was a study of Canadian

> They might still be right; this is only a pre-print, only focused on one specific aspect of COVID and the effect size is small. There was a study of Canadian data (Ontario) recently as well which interestingly showed large differences depending on the combo (Pfizer/Pfizer, Pfizer/Moderna, Moderna/Moderna, Moderna/Pfizer) of 1st and 2nd shot: https://www.medrxiv.org/content/10.1101/2021.12.02.21267156v1 https://www.medrxiv.org/content/10.1101/2021.12.02.21267156v...