3 ms·
If you take doubling to mean "doubled FFE" score, this only occurs when you wear a procedure mask under a cloth mask (this combination is in general the most ef
by icegreentea2 6y ago
If you take doubling to mean "doubled FFE" score, this only occurs when you wear a procedure mask under a cloth mask (this combination is in general the most effective as described in the paper).
If you take doubling to mean reduce (1-FFE)(since it is a percentage) by 50%, this only happens when doubling up on one brand of procedure mask, or when wearing a procedure mask under a cloth mask.
Procedure mask over a cloth mask is pretty much only as effective as procedure mask alone, and doubling of cloth masks did not double FFE by any measure.
This headline is the not the best summary of the paper, its abstract, or its title.
- dang 6y agoWe've changed the title to that of the article now. Submitted title was "Wearing two face masks can nearly double the filtering out SARS-CoV2 particles", which broke the site rules: "Please use the original title, unless it is misleading or linkbait; don't editorialize." https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html Submitters: please don't do that. If you want to say what you think is important about an article, that's fine, but do it by adding a comment to the thread. Then your view will be on a level playing field with everyone else's: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&sort=byDate&type=comment&query=%22level%20playing%20field%22%20by:dang https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...