This article, inappropriately whimsical in the initial paragraphs, gives summaries of the effectiveness of 14 types of face masks. They are the results of a simple Duke University test to analyse their effectiveness. The fitted N95 came out tops. Three-layer surgical masks and cotton masks, which many people have been making at home, also performed well.
Read here (Forbes, August 9, 2020)
Read the Duke University paper ‘Low-cost measurement of face mask efficacy for filtering expelled droplets during speech’ here
