Masks and the way this virus spreads isn't new.
New medicines, requiring trials are novel.
Golden eggs and apples shouldn't be compared.
What new data has finally come in that has shown that masks do not slow the spread or that they do? And new we have guidance?
The problem here is that the medical community, when they have skin in the game wear and recommended masks, from day 1.
Again, the virus is novel, how it spreads is not.