But if you can imagine a Home Depot bucket--a five-gallon Home Depot bucket--we're able to take a particle--and this was developed and designed by our folks at the NBACC. We're able to take a particle of a virus and suspend it in the air inside of this drum and hit it with various temperatures, various humidity levels, multiple different kinds of environmental conditions, to include sunlight. And we're able to measure the decay of that virus while it's suspended in the air. This is how we do our aerosol testing.