Negative ions significantly reduced the concentration of particulate matter in the air above and effectively disinfected viruses stuck to the solid plate at the level of both nucleic acid and virus titer. The disinfection efficiency was >99.8% after 1-h exposure. Moreover, negative ions effectively disinfected aerosolized viruses; the disinfection efficiency was more than 87.77% after purification for 10 min. 

負離子顯著降低了上方空氣中顆粒物的濃度，在核酸和病毒滴度的水平上對粘附在固體板上的病毒進行了有效的消毒。暴露1小時後消毒效率>99.8%。此外，負離子有效消毒霧化病毒；淨化10 min後消毒效率達87.77%以上。

In the experiment of transmission between susceptible animals, negative ions 100% inhibited the aerosol transmission of SARS-CoV-2 and influenza A virus.

在易感動物之間的傳播實驗中，負離子100%抑制了SARS-CoV-2和甲型流感病毒的氣溶膠傳播。

節錄自https://www.frontiersin.org/articles/10.3389/fcimb.2022.897416/full

總結以上：

建議大家有閒錢可以買一台能釋放大量負離子的空調或空氣清淨機，來對抗空氣中的病毒。