Fig. 14.
Comparison between particles trapped on all surfaces of students' bodies with the bodies of all individuals and suspending particles in three scenarios: 8, 9 and 10.
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.