from 21st Century Wire:

Are masks really that effective in stopping the spread of respiratory diseases?
It is still widely assumed that personal protective equipment (PPE) is an essential item in protecting oneself and others against the COVID-19 epidemic. Certainly, this is of paramount concern for healthcare workers who will be using a combination of N95 masks, shields, gloves and gowns in order to protect themselves from becoming infected from SARS-CoV-2.
But for the general public mixing and mingling outdoors and in public spaces, do cotton or surgical masks really offer adequate protection?









