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.
Surface contamination as a function of particle size for (a) the full capacity model with no sneeze guards, (b) the reduced capacity model with no sneeze guards, and (c) the full capacity model with sneeze guards. Values below 0.01% are not shown.
