1
Published 2002
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

2
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

3
Published 2001
Dept. of Health and Human Services, U.S. Public Health Service

4
Published 2012
World Health Organization

5
Published 2011
U.S. Dept. of Health and Human Services, U.S. Public Health Service, Office of the Surgeon General

6
by Fiore, Michael
Published 1996
U.S. Dept. of Health and Human Services, Public Health Service, Agency for Health Care Policy and Research

7
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

9
Published 2014
World Health Organization

12
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

13
Published 2002
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

14
Published 2011
U.S. Dept. of Health and Human Services, U.S. Public Health Service, Office of the Surgeon General

17
Published 2002
US Department of Health and Human Services

18
Published 2020
Centers for Disease Control and Prevention