Inside Spain’s ASF crisis: how a top lab became the centre of a virus outbreak

In November 2025, Europe’s largest pig producing country, Spain, faced an unprecedented crisis when the African Swine Fever (ASF) virus was detected in its wild boar population. This outbreak sent shockwaves through the agricultural sector, threatening the livelihoods of thousands of farmers and raising concerns about the future of the country’s pork industry. At the heart of this crisis was the IRTA-CReSA research lab, located just outside Barcelona. While the lab played a crucial role in analyzing blood and carcasses to understand the virus’s spread, it also became the focal point of intense scrutiny, as questions about its potential involvement in the outbreak began to surface.

The IRTA-CReSA lab, a joint venture between the Spanish National Research Council (CSIC) and the University of Barcelona, is renowned for its expertise in animal health and virology. Its state-of-the-art facilities and experienced team made it a natural choice to lead the investigation into the ASF outbreak. Researchers at the lab quickly got to work, analyzing samples from infected wild boars and attempting to trace the virus’s origin. Their efforts were critical in mapping the virus’s spread across the country and identifying potential containment strategies.

However, as the investigation progressed, whispers of conspiracy began to circulate. Some experts suggested that the lab’s proximity to wild boar habitats and its handling of ASF-infected samples might have inadvertently contributed to the outbreak. Critics pointed out that the lab had been conducting research on ASF for several years, and the possibility of a leak or accidental release of the virus could not be entirely ruled out. These concerns intensified when it was revealed that the lab had recently expanded its ASF research, including experiments on live virus strains.

In response to the mounting suspicions, the Spanish government launched an independent inquiry into the lab’s operations. Investigators meticulously reviewed the lab’s protocols, security measures, and records to determine whether any breaches or negligence could have led to the virus’s release into the wild. Meanwhile, the lab’s directors insisted that they had followed strict biocontainment procedures and that their research had been conducted in a manner that posed no risk to the environment. They emphasized that their work was essential for understanding the virus and developing strategies to combat its spread.

As the inquiry dragged on, tensions between proponents of the lab’s innocence and those accusing it of negligence grew. Supporters of the lab argued that its expertise was too valuable to discard and that the outbreak was likely the result of natural transmission from wild boars migrating from neighboring countries. They pointed out that ASF had already been detected in wild boar populations in several European countries, and the virus’s presence in Spain was not entirely unexpected.

Others, however, remained unconvinced. They highlighted the lab’s unique position as a potential source of the outbreak, given its extensive work with ASF and its location near vulnerable wild boar populations. These critics demanded transparency and called for stricter regulations on research labs handling dangerous pathogens. They argued that the ASF crisis was a stark reminder of the risks associated with conducting such research and the need for robust oversight to prevent similar incidents in the future.

The ongoing debate surrounding the IRTA-CReSA lab and the ASF outbreak has highlighted the complex interplay between scientific research, environmental risks, and public health. While the lab’s role in analyzing the virus and informing containment efforts cannot be denied, the questions about its potential involvement in the outbreak have sparked a broader conversation about the responsibilities of research institutions in safeguarding both human and animal health. As the inquiry continues, the Spanish government and the international scientific community will be closely watching to see whether the lab can clear its name and whether new protocols can be established to prevent such crises in the future.