Israel’s ProtectAir uses tiny amounts of Chlorine Dioxide (ClO2) to safely deactivate Covid-19. The device contains granules that activate on opening and protects a room for weeks.  Meanwhile trials at Sheba hospital show Israel’s Aura Smart Air can eliminate 99.9% of the virus from the air.

https://protectair.co.il/en/home-english/

https://www.calcalistech.com/ctech/articles/0,7340,L-3842434,00.html

https://www.israel21c.org/four-israeli-inventions-that-can-help-clean-the-air-of-covid-19/