17 ms·

Here’s a nice interactive graphic showing how masks block particles: https://www.nytimes.com/interactive/2020/10/30/science/wear-mask-covid-particles-ul.html h

• neither_color 5y ago
  That's a very cool visualization and I wish I'd seen it before. I am curious though as to what makes some viruses have higher R values than others. These masks more effectively stopped influenza and I still don't understand why.
  • jwlake 5y ago
    Google cross-protection and competition in respiratory viruses. Lots of pre-2019 literature.