On the evening of Sunday, 26 November, two days after he had convinced the nurses to remain on the job, Margaret was startled to hear her husband's voice sound heavily congested. He told her that he had a "terrible flu". The next morning, he and Sister Maria agreed that he had malaria. "We said malaria, but we thought Ebola," she later said. His fever grew worse through the day, a Monday, and by Wednesday was vomiting and Dr. Pierre Rollin of the CDC took blood samples for testing. A nurse who was administering an intravenous drip that evening at his home was surprised when he began speaking distinctly, though not to her: "Oh, God, I think I will die in my service. If I die, let me be the last." Then, in a clear voice, he sang "Onward, Christian Soldiers". Rollin came back with the results the next morning; it was Ebola. Lukwiya immediately asked to be put into the isolation ward, stating "Since I am the boss, I should show an example."