In the previous article, we talked about how to easily make the 70% diluted ethanol from the 95% ethanol. Some people were asking how often I should clean the surface. How long can the coronavirus survive on the different types of the surface?
So here is the summary of the longest time that the coronavirus can still be detected on the surface of different materials:
Printing and tissue papers: 3 hours**
Copper (the materials of coins): 4 hours*
Cardboard: 1 day*
Wood: 2 days**Cloth: 2 days**
Polypropylene plastic: 3 days*Stainless steel: 3 days*
Glass: 4 days**Banknote: 4 days**
The outer layer of the surgical mask: 7 days**
*At 69.8 to 73.4°F and 40% relative humidity
**At 71°F and 65% relative humidity
Reference: The New England Journal of Medicine* and The Lancet Microbe**