called the World Health Organization, who came with a staff from the American Centers for Disease Control. By the time the young American doctors arrived, thirty-nine nurses and two doctors were dead. The CDC doctors worked quickly, isolating all patients with fevers. Natives were infuriated when the Americans banned the traditional burials of the victims since the ritual bathing of the bodies was clearly spreading the disease further. Within weeks, however, the epidemic was under control. In the end, the Ebola Fever virus, as it came to be known, killed 53 percent of the people it infected, seizing 153 lives before it disappeared as suddenly and mysteriously as it had arisen. Sex and blood were two horribly efficient ways to spread a new virus, and years later, a tenuous relief would fill the voices of doctors who talked of how fortunate it was for humankind that this new killer had awakened in this most remote corner of the world and had been stamped out so quickly. A site just a bit closer to regional crossroads could have unleashed a horrible plague. With modern roads and jet travel, no corner of the earth was very remote anymore; never again could diseases linger undetected for centuries among a distant people without finding some route to fan out across the planet.
The battle between humans and disease was nowhere more bitterly fought than here in the fetid equatorial climate, where heat and humidity fuel the generation of new life forms. One historian has suggested that humans, who first evolved in Africa eons ago, migrated north to Asia and Europe simply to get to climates that were less hospitable to the deadly microbes the tropics so efficiently bred.
Here, on the frontiers of the world’s harshest medical realities, Grethe Rask tended the sick. In her three years in Abumombazi, she had bullied and cajoled people for the resources to build her jungle hospital, and she was loved to the point of idolization by the local people. Then, she returned to the Danish Red Cross Hospital, the largest medical institution in the bustling city of Kinshasa, where she assumed the duties of chief surgeon. Here she met Ib Bygbjerg, who had returned from another rural outpost in the south. Bygbjerg’s thick dark hair and small compact frame belied his Danish ancestry, the legacy, he figured, of some Spanish sailor who made his way to Denmark centuries ago. Grethe Rask had the features one would expect of a woman from Thisted, high cheekbones and blond hair worn short in a cut that some delicately called mannish.
To Bygbjerg’s eye, on that Christmas Eve, there were troubling things to note about Grethe’s appearance. She was thin, losing weight from a mysterious diarrhea. She had been suffering from the vague yet persistent malaise for two years now, since her time in the impoverished northern villages. In 1975, the problem had receded briefly after drug treatments, but for the past year, nothing had seemed to help. The surgeon’s weight dropped further, draining and weakening her with each passing day.
Even more alarming was the disarray in the forty-six-year-old woman’s lymphatic system, the glands that play the central role in the body’s never-ending fight to make itself immune from disease. All of Grethe’s lymph glands were swollen and had been for nearly two years. Normally, a lymph node might swell here or there to fight this or that infection, revealing a small lump on the neck, under an arm, or perhaps, in the groin. There didn’t seem to be any reason for her glands to swell; there was no precise infection anywhere, much less anything that would cause such a universal enlargement of the lymph nodes all over her body.
And the fatigue. It was the most disconcerting aspect of the surgeon’s malaise. Of course, in the best of times, this no-nonsense woman from north of the fjord did not grasp the concept of relaxation. Just that day, for example, she had not been scheduled to work, but she put in a full shift,