If you think stopping droplets equals stopping the spread of the virus, watch this:
https://youtu.be/S1dRPQg26Hc
Playlist of videos on the wearing of face masks:
https://www.youtube.com/playlist?list=PL8hE8pLrcduS9_kfUPcZ9ZUxvOisxxdvK
6:21
44:21
14:23