COVID-19 Virus 'Cells' traveling traveling by water particles smaller than "droplets". They're called "Water Aerosol",
.. that is: μm - unit of weight, in micrograms. 1 gram=1,000μm droplets weigh 5 to 10μm, aerosols weigh less than 5 μm A large proportion of the spread of COVID-19 occurrs through airborne transmission of aerosols rather than droplets. Aerosols can: - Accumulate - Remain infectious in indoor air for hours - Be easily inhaled deep into the lungs Measures to reduce aerosol transmission; Universal masking. Humans produce respiratory droplets ranging from 0.1 to 1000 μm. Particle size, gravity, and evaporation, determines how far emitted droplets & aerosols will travel in air. Saliva Droplets will fall faster than they evaporate; contaminating surfaces and leading to contact transmission. Aerosols will evaporate faster than they can settle. They are buoyant and can be transported by air movement over 6 feet. There are two major respiratory virus transmission pathways: 1. Contact between pe...