Volume 5, Number 3—June 1999
Synopsis
Respiratory Diseases among U.S. Military Personnel: Countering Emerging Threats
Figure 3

Figure 3. Military sites in the United States participating in Department of Defense influenza surveillance. The focus of surveillance at etiology-based sites is to determine the viral causes of influenzalike illnesses; the focus of population-based sites is to closely monitor for influenzalike illness epidemics.