Scene 1—At the Laboratory Door (Beni, North Kivu, Democratic Republic of Congo, 2019)

The outbreak was already months old when I arrived in Beni, after an early stint in Mangina, where the first sparks had caught (2). In Mangina, confusion. In Beni, something heavier, grief hardened into suspicion.

One afternoon, a man died. His family was told to wait for the PCR result before burial. The epidemiologists and socio-anthropologists did the explaining. The family listened, at first. Then the hours stretched, elastic and cruel.

The delay was not owing to neglect. Samples poured in daily, from the living and the dead, and each tube demanded safe handling, logging, extraction, amplification. Couriers threaded insecure roads to bring samples in; machines ran almost constantly. Even so, the reality of field diagnostics often translates to abrupt nighttime pauses: patients arriving at night were typically sampled the next morning once the lab opened, and results were targeted within a day or two under difficult conditions (field laboratories tracked <48-hour turnaround for suspect samples during this outbreak) (3).

The family’s patience broke. They came directly to the laboratory, voices raised, fists pounding on doors. For them, waiting had crossed into injustice. For us inside, the moment was suffocating, caught between stress and comprehension. We could not deny their grief, but we could not conjure truth faster than the cycles would allow.

I remember standing by the glass, seeing their anger, hearing their shouts, while technicians in suits kept their heads down, processing samples one by one. Between us lay racks of tubes, each a story held at 95°C, denatured and re-annealed, amplified toward a verdict. In that corridor, I realized that waiting was a shared burden, but not an equal one. The family waited to bury. We waited to be sure. Everyone paid the price of that interval.

As the outbreak unfolded across North Kivu and Ituri, the world’s second-largest Ebola outbreak (4), field labs multiplied and testing volume surged. The World Health Organization’s situational reports from 2019 described 10–11 operational field labs and thousands of samples processed weekly despite conflict and access constraints (2,5). The technology promised speed; the terrain and insecurity rationed it. Families lingered overnight outside gates. Inside, we tallied cycles and prayed the power held. In the ledger of outbreak work, those hours accumulate like interest, emotional debt that someone, somewhere will have to pay.

The result eventually came. It always does. In Beni, though, as in so many places, the result arrived threaded with the memory of the wait, and with a thinner strand of trust.

Scene 2—Curves on a Screen, Silence in a Ward (Dakar and Podor, Senegal, 2022)

Years later, I lived another form of waiting, not at the bedside, but at the Institut Pasteur de Dakar bench. Calls came from Podor, in the Saint-Louis region. Fever, bleeding, collapse: suspected viral hemorrhagic fever. Tubes began to land on our benches, tagged with urgency and carefully packed miles away, where families and clinicians were bracing.

We moved as fast as protocols permitted. Extraction. Master mix. Plates set, sealed, and run. Confirmation assays. Each step deliberate, each minute felt. We knew the ward rhythm by proxy: the pacing in a corridor, the weight of a clinician’s hesitation, the family watching the gate. In outbreaks, a lab result is never just data; a hinge turns on that result, and action swings.

That month, Podor learned Crimean-Congo hemorrhagic fever’s terms. Three human cases were confirmed; 2 patients died. We documented virus circulation in local ticks and livestock. It was the first severe cluster of its kind there, and it cut fast (6). We delivered results quickly by laboratory standards. For some patients, the body ran ahead of the numbers. When the curves rose on our screen, they carried more than science. They carried the echo of the waiting we had all been doing.

Later analyses teased out the context. Podor had no sentinel site in the national syndromic surveillance network before the outbreak (7). In at least 1 fatal case, viral hemorrhagic fever was not among the diagnostic considerations at first, suggesting late recognition and confirmation. After the outbreak, sentinel coverage expanded to Podor (6). The science is clear, but the human lesson is clearer: surveillance and training shorten the wait, and sometimes that difference is a life.

We returned to our benches the next day. The machines hummed, the city stirred, and somewhere a family decided how to remember those last hours, the hours before the answer. An answer did come, of course, but not soon enough for everyone.