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Four American health-care workers were being flown to Nebraska on Saturday after being exposed to the Ebola virus and possibly having contact with an American health-care worker who recently contracted the deadly disease while treating patients in Sierra Leone, Nebraska Medical Center in Omaha said. At least 10 Americans in all may be brought back to the U.S. from Sierra Leone for monitoring because of possible exposure to the Ebola-stricken health-care worker, the U.S. Centers for Disease Control and Prevention said. A spokesman said none has been diagnosed with Ebola or shown symptoms of the disease. (Calvert and McKay, 3/14)

The first of a group of 10 American aid workers who may have come into contact with the Ebola virus in Sierra Leone were evacuated on Saturday, American government and aid officials said. They will be the largest group of Americans to have returned home over fears of exposure to the virus since an outbreak in three West African countries was declared last year. (Fink, 3/14)