This list was last updated on Jan. 15, 2015 and is maintained weekly by the Centers for Disease Control and Prevention (CDC).
Kaiser Los Angeles Medical Center; Los Angeles, California
Kaiser Oakland Medical Center; Oakland, California
Kaiser South Sacramento Medical Center; Sacramento, California
University of California Davis Medical Center; Sacramento, California
University of California Irvine Medical Center; Orange, California
University of California Los Angeles Medical Center; Los Angeles, California
University of California San Diego Medical Center; San Diego, California
University of California San Francisco Medical Center; San Francisco, California
Emory University Hospital; Atlanta, Georgia
Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago, Illinois
Northwestern Memorial Hospital; Chicago, Illinois
Rush University Medical Center; Chicago, Illinois
University of Chicago Medical Center; Chicago, Illinois
Johns Hopkins Hospital; Baltimore, Maryland
University of Maryland Medical Center; Baltimore, Maryland
National Institutes of Health Clinical Center; Bethesda, Maryland
Baystate Medical Center; Springfield, Massachusetts
Boston Children's Hospital; Boston, Massachusetts
Massachusetts General Hospital; Boston, Massachusetts
UMass Memorial Medical Center; Worcester, Massachusetts
Allina Health's Unity Hospital; Fridley, Minnesota
Children's Hospitals and Clinics of Minnesota - Saint Paul campus; St. Paul, Minnesota
Mayo Clinic Hospital - Rochester, Saint Marys Campus; Rochester, Minnesota
University of Minnesota Medical Center, West Bank campus, Minneapolis, Minnesota
Nebraska Medicine - Nebraska Medical Center; Omaha, Nebraska
North Shore System LIJ/Glen Cove Hospital; Glen Cove, New York
Montefiore Health System; New York City, New York
New York-Presbyterian/Allen Hospital; New York City, New York
NYC Health and Hospitals Corporation/HHC Bellevue Hospital Center; New York City, New York
Robert Wood Johnson University Hospital; New Brunswick, New Jersey
The Mount Sinai Hospital; New York City, New York
MetroHealth Medical Center; Cleveland, Ohio
Children's Hospital of Philadelphia; Philadelphia, Pennsylvania
Hospital of the University of Pennsylvania; Philadelphia, Pennsylvania
Lehigh Valley Health Network - Muhlenberg Campus; Muhlenberg, Pennsylvania
Penn State Milton S. Hershey Medical Center; Hershey, Pennsylvania
University of Texas Medical Branch at Galveston; Galveston, Texas
Methodist Hospital System in collaboration with Parkland Hospital System and the University of Texas Southwestern Medical Center; Richardson, Texas
Texas Children's Hospital; Houston, Texas
University of Virginia Medical Center; Charlottesville, Virginia
Virginia Commonwealth University Medical Center; Richmond, Virginia
Children's Hospital of Wisconsin, Milwaukee; Milwaukee, Wisconsin
Froedtert & the Medical College of Wisconsin - Froedtert Hospital, Milwaukee; Milwaukee, Wisconsin
UW Health - University of Wisconsin Hospital, Madison, and the American Family Children's Hospital, Madison; Madison, Wisconsin
MedStar Washington Hospital Center; Washington, D.C.
Children's National Medical Center; Washington, D.C.
George Washington University Hospital; Washington, D.C.
Harborview Medical Center; Seattle, Washington
Seattle Children's Hospital; Seattle, Washington
From CDC.gov