In February 2021, a town in Brazil showed up for a groundbreaking whole-of-town randomized Covid vaccine trial, providing evidence of population effects of mass vaccination in a pandemic.

My latest @PLOS post digs into this exciting precedent, and why it matters so much:

https://absolutelymaybe.plos.org/2026/03/28/a-unique-pandemic-control-trial/

#Covid #Covid19 #Vaccines