How does it work? CAIS works through the reaction of negatively and positively charged ions. The ions attach to airborne pathogens, such as viruses causing a chemical reaction on the cell membrane’s surface. This deactivates the viruses, rendering them harmless, so they can no longer spread or cause infection. CAIS is the leading innovator in indoor air sanitization and purification products that results in healthier, more productive indoor environments in institutional, commercial, residential and industrial applications. CAIS uses highly efficient bipolar ionization technology to kill harmful airborne viruses and neutralizes indoor air pollutants. The ionised particles neutralise positively charge Spike Proteins on the virus. It breaks the chain of virus movement.