In my circles, it's one of the most discussed on the Recurse Zulip, it was shared by one of the Quakers on our Ministry committee (a college prof), and it was posted by one of the game developers I admire and follow on Twitter.
It does a good job of visual storytelling, the author obviously is good at being a "growth hacker," but it points to something deeply wrong when people are basing their decision-making on a document like this rather than communications from actual public health professionals.
Not sure how "widely" shared it is, but it's a good, informative piece.