Madrid’s Pardo Palace, where the Spanish Monarchy accommodates guests of the government, has installed air purifiers from Israel’s Aura Smart Air (reported here previously). The system kills 99.9% of viruses in the air, including the coronavirus.

https://jewishbusinessnews.com/2020/12/01/spains-royal-palace-chooses-israeli-technology-to-purify-the-air-from-covid-19/

https://techtime.news/2020/10/15/aura-air/