Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Inner surface (untreated) | Inner surface (after disinfection) |
Outer surface (untreated) | Outer surface (after disinfection) |
|
|---|---|---|---|---|
| Effect of ethanol on disinfection of PLA masks from natural microbial contamination (CFU/mL) | ||||
| PLA mask 1 | 7,000 | 19 | 85 | 0 |
| PLA mask 2 | 257 | 0 | 153 | 0 |
| PLA mask 3 | 108 | 2 | 59 | 2 |
| average | 2,455 | 7 | 99 | 1 |
