The Centers for Disease Control and Prevention is the nation’s premier public health agency – working to ensure healthy people in a healthy world. CDC, a part of the U.S. Department of Health and Human Services, is the primary Federal agency for conducting and supporting public health activities in the United States. CDC’s focus is not only on scientific excellence but also on the essential spirit that is CDC – to protect the health of all people. CDC keeps humanity at the forefront of its mission to ensure health protection through promotion, prevention and preparedness.