Oh, wait, they don't even work in remote isolated polar outposts:
https://www.republicworld.com/world-news/rest-of-the-world-news/in-antarctica-ice-station-hit-by-covid-19-outbreak-more-than-half-of-crew-tests-positive-articleshow.html
I don’t believe anything short of 160 studies
Sorta like the vaxx. (un)safe, (in)effective, (un)approved. Anyone with half a gabby understands this.