Scientists at Israel’s Technion Institute have invented the Air-screen fluidic facemask. It blocks virus-laden aerosols and droplets by use of a tiny fan to produce a rectangular air jet, or screen, in front of the wearer’s face. An Israeli startup Wisdom Wearables will commercialize the mask.

https://worldisraelnews.com/invisible-air-screen-israeli-researchers-find-trailblazing-alternative-to-face-masks/

https://www.timesofisrael.com/israeli-scientists-invent-face-mask-made-of-thin-air-which-blows-virus-away/

https://www.youtube.com/watch?v=4D_H8VHWtH8