National Center for Infectious Diseases (NCID) is to prevent illness, disability, and death caused by infectious diseases in the United States and around the world.National Center for Infectious Diseases's (NCID)staff members work in partnership with local and state public health officials, other federal agencies, medical and public health professional associations, infectious disease experts from academic and clinical practice, and international and public service organizations.http://www.cdc.gov/ncidod/

The Division of Vector-Borne Infectious Diseases serves as a national and international reference center for vector-borne viral and bacterial diseases. As one of the few remaining centers responsible for these agents, it is incumbent on the division to maintain leadership and scientific competence in all major disciplines relating to the field of vector-borne infectious diseases.http://www.cdc.gov/ncidod/dvbid/

The National Immunization Program (NIP) is a part of the Centers for Disease Control and Prevention, located in Atlanta, Georgia. As a disease-prevention program, NIP provides leadership for the planning, coordination, and conduct of immunization activities nationwide.http://www.cdc.gov/nip/

The National Institute for Occupational Safety and Health (NIOSH) is the federal agency responsible for conducting research and making recommendations for the prevention of work-related injury and illness.http://www.cdc.gov/niosh/homepage.html

CDC's HIV is to prevent HIV infection and reduce the incidence of HIV-related illness and death, in collaboration with community, state, national, and international partners. CDC’s programs work to improve treatment, care, and support for persons living with HIV and to help build capacity and infrastructure to address the HIV/AIDS pandemic.http://www.cdc.gov/hiv/