>>11484767Testing against coronavirus shows greatly increased efficacy at 80% and 90% over 70, and greatly reduced action at 60%. The problem with 95-99% is that it evaporates very quickly, and retards not applying enough and shaking their hands dry only get 10-20 seconds of exposure time instead of the recommended 30s. If applied properly, it's usually much more effective to use 90% or 95% ethanol against viruses. Usually, because it depends on the particular virus.
https://www.sciencedirect.com/science/article/pii/S0195670120300463https://www.sciencedirect.com/science/article/pii/S0195670117304693Against bacteria it's completely different. 70-80% is usually the ideal range for vulnerable bacteria. You really have to know what you're trying to kill though. Although ethanol has pretty broad action, plenty of things are resistant to it.
