Plasma cluster generators release positive and negative ions into the air at the same time, causing them to collide and generate OH radicals. This process suppresses airborne viruses and bacteria by damaging their surface. Our clinic ceilings feature 7 commercial-grade high-power plasma cluster generators. These devices are the first in the world to gain official approval by demonstrating a 91.3% reduction of virus particles in experiments with COVID-19 (new coronavirus).