The 1979 Sudan Ebola outbreak brought Centers for Disease Control and Prevention physician Joe McCormick into an active epidemic zone to collect human blood and return a live strain to Atlanta. His fieldwork placed him among severely ill patients during a civil war, and a needle puncture exposed him to the virus. He nevertheless stayed to continue collecting samples and caring for patients. He survived without developing Ebola, an outcome that later informed his belief that the virus did not spread easily, especially through the air.

Background and Mission

Reports reached the Centers for Disease Control and Prevention in 1979 that Ebola had reappeared in southern Sudan, in the same general places where it had emerged in 1976. The renewed outbreak was dangerous not only because of the disease but because the affected region was also a war zone. McCormick volunteered to go there, collect human blood, and bring a strain back alive for study. No one else wanted to accompany him, so he traveled alone.

His assignment was a race against limited time and difficult access. He flew into the region in a small plane piloted by two frightened bush pilots. Near sunset, they landed at an airstrip close to a Zande village. The pilots would not leave the aircraft; they planned to depart at sunrise and warned McCormick that he had until then to find the virus. The arrangement left him one night on the ground, with no assurance that the plane would return for him.

Work in the Village

Carrying his backpack, McCormick walked into the village and followed the sound of suffering to a mud hut. Villagers had gathered outside but did not enter. His flashlight had no batteries, so he asked for a light and was given a lantern. Inside, he found people in grave condition, including patients convulsing and others who were unresponsive. The hut was an active site of infection, and he understood that Ebola was present.

McCormick had brought rudimentary protective supplies: rubber gloves, a paper gown, a paper surgical mask, and paper covers for his shoes. After putting them on, he laid out blood tubes and syringes and began drawing samples. He worked through the night on his knees, collecting blood and helping the patients as best he could. The samples were intended not merely to document the outbreak but to carry the virus back for laboratory investigation.

During one blood draw, an older woman suddenly moved, and the needle came out of her arm and punctured McCormick’s thumb. He recognized that the injury could have introduced the virus directly into his bloodstream. At dawn, he gathered the blood tubes and handed them to the pilots. He now faced a choice: leave for medical assistance while the plane was available, or remain with the patients and continue the work.

Exposure and Decision to Stay

McCormick stayed. He was a physician, and the people in the hut were his patients; he also wanted to collect more samples. He thought that if he developed a headache, he might be able to radio for help and have a plane sent for him. The decision meant accepting continued exposure rather than treating his own possible infection as a reason to end the mission.

He had brought two bags of blood serum, chilled on ice, which he believed contained antibodies that might protect him. He gave himself a transfusion, then rested in a hut. That night he could not sleep, preoccupied with the needle puncture and the possibility that the virus had begun multiplying in his body. He drank half a bottle of Scotch in an effort to sleep. The following days did not immediately resolve the uncertainty: he continued working with Ebola patients for four days and watched the older woman whose movement had caused the puncture.

On the fourth day, the woman recovered. McCormick concluded that she had probably been suffering from malaria rather than Ebola; what had looked like a seizure had likely been shivering from fever. The puncture had therefore occurred during an episode that was not itself an Ebola infection. That clarification reduced the force of the apparent exposure, but it did not erase the fact that McCormick had spent days in the hut among Ebola patients and had not developed the disease.

Aftermath and Significance

McCormick’s survival became part of his reasoning about transmission. At a later meeting concerning the Reston outbreak, he argued that Ebola was not easy to catch, particularly through the air, pointing to his extended time in the hut without becoming ill. His experience supplied a concrete basis for his skepticism, but it remained one person’s exposure history: it could inform debate about risk without proving that all contact or inhalation was harmless.

The episode also shows how outbreak investigation depended on decisions made under severe constraints. McCormick had only the interval before the pilots’ departure, an improvised light, basic protective materials, and a small supply of blood-collection equipment. When the needle entered his thumb, his options narrowed to leaving or continuing; he chose to remain with the patients and the investigation. The older woman’s recovery then altered the meaning of the incident: the event that seemed to provide a direct measure of Ebola exposure involved a patient who probably had malaria instead.

The 1979 mission thus joined field investigation, clinical duty, and personal risk in a single night and its aftermath. McCormick returned with samples and without developing Ebola. His account later entered the argument over how readily the virus could spread, while the limits of what his survival could establish remained essential to interpreting that evidence.