WORCESTER, Mass. —Dr. Rick Sacra, of Holden, who doctors said was successfully treated for Ebola at the University of Nebraska Medical Center, was admitted to UMass Memorial Medical Center in Worcester Saturday morning with a respiratory illness. Doctors do not think it likely that Sacra, who has been suffering from a persistent cough and low-grade fever for several days, has suffered a relapse of Ebola. "Even though the likelihood of Dr. Sacra having a relapse of Ebola is extremely low, doctors will run tests to be 100 percent sure,” said Dr. Phil Smith, medical director of the Biocontainment Unit at...