The NIH Clinical Center is a hospital solely dedicated to clinical research at the National Institutes of Health campus in Bethesda, Maryland. The Clinical Center, known as Building 10, consists of the original part of the hospital, the Warren Grant Magnuson Clinical Center, and the newest addition, the Mark O. Hatfield Clinical Research Center. The two parts are connected to form one large building. In October 2014, Clinical Center staff successfully treated one of the first few Ebola virus cases in the United States.