SARS outbreak

The 2002–2003 SARS outbreak became a test of how quickly researchers could turn scattered reports of a new disease into a reliable explanation of its cause. The World Health Organization (WHO) mobilized eleven laboratories across countries to investigate the illness together. Their shared work identified the coronavirus responsible in a matter of weeks, a result the book presents as a collective scientific discovery rather than the achievement of any one laboratory or scientist.

Outbreak and international response

In early February 2003, China’s Ministry of Health reported to the WHO that 305 people in Guangdong Province had contracted a severe respiratory disease since November 2002; five had died. The illness resembled influenza, but laboratory tests had not detected influenza viruses. Within weeks, a traveler returning from China and Hong Kong fell ill in Hanoi, while workers at a Hong Kong hospital developed similar symptoms. Reports of further outbreaks followed. By early March, the illness—now called SARS—appeared to be a new disease rather than a new type of flu.

The WHO issued a global warning advising travelers about journeys to southern Asia and activated a surveillance system to flag new outbreaks. Because SARS was already understood to spread from person to person, tracking cases could help guide quarantine. But the source of the disease also needed to be identified: finding its cause could make testing possible and might eventually help researchers develop a vaccine.

A shared investigation

On March 15 and 16, the WHO contacted eleven research laboratories around the world, including laboratories in France, Germany, the Netherlands, Japan, the United States, Hong Kong, Singapore, Canada, the United Kingdom, and China. All agreed to participate. On March 17, they began what the WHO called a “collaborative multicenter research project.”

The laboratories held daily teleconferences to compare work, discuss possible next steps, and debate results. They posted electron-microscope photographs, analyses, and test results on a WHO website, and regularly exchanged virus samples so that teams could check and build on one another’s findings. Working on the same samples in parallel allowed laboratories to investigate at once rather than wait for a single center to finish and report back.

The investigation narrowed its possibilities step by step. Early candidates included several viruses found in samples from some SARS patients but not others; the laboratories considered and then ruled these out. On March 21, scientists at Hong Kong University isolated a virus that seemed promising. That same day, scientists at the Centers for Disease Control in the United States independently isolated a virus that looked like a coronavirus under an electron microscope. Its identification was unexpected: coronaviruses caused serious illness in animals, but were generally associated with milder effects in humans.

During the following week, laboratories detected the coronavirus in a wide range of samples from people diagnosed with SARS. Teams in Germany, the Netherlands, and Hong Kong began sequencing it. In early April, infected monkeys in the Netherlands laboratory developed full-blown cases of SARS. By April 16, only a month after the collaborative project began, the laboratories were confident enough to announce that a coronavirus caused the disease.

Collective discovery and scientific knowledge

Cynthia Goldsmith, an electron microscopist at the Centers for Disease Control and Prevention laboratory in Atlanta, was the first person identified as having spotted the coronavirus. But that observation alone did not establish that the virus caused SARS. Weeks of work across the laboratory network were needed to demonstrate the connection, and the studies that eliminated other possible causes helped make the conclusion more secure. The book therefore treats the discovery as an achievement of the group of laboratories: a single team might have taken months or years to isolate the virus, while collaboration brought the result within reach in weeks.

The network had no single scientific director assigning each laboratory its samples, methods, or tasks. The WHO organized the collaboration, but the laboratories themselves agreed to share relevant data and meet each morning; the way work was divided was largely left to them. The WHO lacked the authority to direct academic and government laboratories, a practical constraint that became an advantage in this case: the teams could determine for themselves how best to pursue the evidence.

The case also shows why scientific discovery does not end with the first observation. The coronavirus caused SARS before the WHO announced the finding, but the claim gained scientific standing as other researchers scrutinized the laboratories’ work and accepted that it demonstrated the connection. Work on tests and possible vaccines proceeded on the basis of that broader scientific acceptance. The episode thus distinguishes the existence of a fact from the process by which a community establishes it as reliable knowledge.

Trust, scrutiny, and shared evidence

The book places the SARS investigation within a larger account of science as an enterprise built on open exchange. Scientists publish results and make data available so that others can assess conclusions, develop new hypotheses, and undertake further experiments. Even unsuccessful hypotheses contribute by showing where researchers need not continue searching. In this view, knowledge is not merely accumulated from predecessors; contemporary scientists also depend on one another’s work.

That openness entails trust, but not blind acceptance. Experiments can be replicated and fraud can be exposed. Yet most scientists do not personally repeat most studies; they rely on colleagues’ data and accounts so that research can move forward rather than continually retrace old ground. The SARS result illustrates both sides of this arrangement: the laboratories shared evidence and samples, while the larger scientific community’s scrutiny and acceptance gave the causal claim standing. Its central lesson is not that collective judgment cannot err, but that coordinated investigation and shared evidence can make a discovery possible far faster than isolated work.