The Centers for Disease Control (CDC) is one of the few federal government agencies of the United Earth Federation, and is headquartered in the Federal Quarter on the Planet Earth. Its prime mandate is to ensure the human race and other original Earthen life forms are protected from disease on a stellar level. It deals with colonies mostly on a voluntary basis, however if a disease or illness posses an interstellar threat to an Earthen lifeform (be it on Earth or abroad), the CDC acquires primary jurisdiction.
The CDC is one of the longest continuously existing organizations in human existence. It was originally established on Earth in 1980 C.E. in a polity then known as the United States of America.