Antibiotics, antiseptics, high-frequency light waves, and oxygen radicals have saved many lives. We must use them selectively and for limited time periods, being fully aware of the ability of microbes to fight back with resistance.
As scientists continue to study ways the coronavirus can be spread, one question involves aerosol droplets that people exhale while breathing. Can those droplets circulate in the air long enough to be picked up by a ventilation system and recirculated through building ducts? There has not been a clear answer.