Fig. 1.
Distribution of a the self-assessed infection vulnerability score and b the score of self-reported frequency of infections. The scores were derived by using factor analysis (see the Methods section)
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.