From Wuhan to Dhaka: What China's Exotic Food Markets Teach South Asia About the Next Pandemic
In late 2019, a cluster of pneumonia cases appeared in the Chinese city of Wuhan. Most of the earliest known patients had direct exposure to the Huanan Seafood Wholesale Market — a sprawling facility where live animals, including wildlife species, were sold alongside conventional produce. What emerged from that market, or its surroundings, was SARS-CoV-2. Within months, a zoonotic spillover event had become the worst global pandemic in a century, killing millions and costing the world economy trillions of dollars. Research published in the journal Science in 2022 identified the market's live wildlife vendor section as geographically and epidemiologically central to the earliest known cases.
The Wuhan event was not unprecedented. It was the most catastrophic instance in a pattern stretching back decades. The 2002–2003 SARS outbreak was associated with wildlife markets in Guangdong Province, where civet cats were sold as food and believed to transmit the virus to humans. The H5N1 avian influenza outbreaks of the 2010s were linked to live poultry markets across China. Scientists had been warning since at least 2007 — a University of Hong Kong study described the reservoir of SARS-like viruses in horseshoe bats combined with the culture of eating exotic mammals in southern China as "a time bomb." That warning went unheeded. The bomb detonated in Wuhan in 2019.
For policymakers across South Asia, the lessons from China's experience with exotic food markets and zoonotic disease transmission are not merely academic. They are urgent. Bangladesh, in particular, already lives with a version of this problem — and its experience with a different virus offers a disturbing preview of what inadequate food safety governance at the human-animal interface can produce.
The Anatomy of a Zoonotic Market Risk
Understanding what actually makes a market dangerous requires precision that was largely absent from early media coverage of the Wuhan outbreak, which tended to treat all "wet markets" as equivalently hazardous. The term "wet market" — originating in Singapore in the 1970s to distinguish fresh-produce markets from dry-goods markets — describes an enormous diversity of trading environments. Most wet markets sell ordinary produce: fish, poultry, vegetables. Zoonotic spillover risk concentrates in a specific subset: markets that sell live wild or exotic animals, where different species are housed in close proximity, stressed by confinement, and slaughtered on-site.
Research published in The Lancet Planetary Health identified six key risk factors in markets that elevate zoonotic transmission probability: the presence of high disease-risk animal taxa, the presence of live animals, the mixing of multiple species, poor sanitation, high human throughput, and inadequate veterinary oversight. Markets that combine several of these factors — as the Huanan market did — are effectively pathogen incubators. Stressed animals shed more viruses. Cages stacked on top of each other facilitate cross-species exposure. Blood, fecal matter, and animal fluids on floors and surfaces create sustained environmental contamination. The conditions that make wildlife markets financially profitable are precisely the conditions that make them epidemiologically dangerous.
China's government response after COVID-19 — a temporary ban on the commercial sale and consumption of most terrestrial wildlife — was significant but imperfect. Policy rollbacks, enforcement gaps, and deep-rooted cultural preferences for consuming wild animals as health-enhancing foods have limited the ban's practical effect. Research published in Nature's Scientific Reports using machine learning to assess market-level food safety risks in China found that provinces with more high-risk markets have more human cases of zoonotic flu, and that specific markets associated with zoonotic disease have higher risk scores including management deficiencies such as illegal wild animal sales. The problem, the research concluded, is not merely structural — it is also regulatory.
Bangladesh's Own Zoonotic Crisis: The Nipah Precedent
Bangladesh does not have China's wildlife market culture. It does not sell pangolins, civets, or exotic bats at commercial markets. But it has its own version of the human-animal interface problem — and the data on that problem in 2024 and 2025 make for uncomfortable reading.
Nipah virus is a bat-borne zoonotic pathogen classified by the World Health Organization as a priority pathogen for research and development of medical countermeasures. Its natural reservoir is fruit bats of the Pteropus genus, which roost widely across Bangladesh. The transmission pathway in Bangladesh is distinctive and culturally embedded: raw date palm sap, harvested during the winter months from December to April, is consumed directly by communities across rural Bangladesh — often collected from trees where bats feed and contaminate the sap with their saliva, urine, and excreta overnight.
Since Bangladesh recorded its first Nipah case in 2001, the virus has caused near-annual outbreaks. By September 2025, Bangladesh had documented 347 cases through its national surveillance system, with an overall case fatality rate of 71.7%. To put that in context: COVID-19 has a case fatality rate that has generally been estimated below 2% in most populations. Nipah kills nearly three-quarters of the people it infects, and there is currently no licensed vaccine or specific treatment.
In 2024, five laboratory-confirmed fatal Nipah cases were reported from Bangladesh. Between January and August 2025, four more fatal cases were confirmed across three geographical divisions — Barisal, Dhaka, and Rajshahi — with one case occurring in Bhola district, the first-ever recorded there. One case in Naogaon occurred outside the typical December-April season entirely, with no history of raw date palm sap consumption, leaving the source of infection under investigation. Researchers at IEDCR and icddr,b noted that near-universal fatality in all 2025 cases confirmed sustained virulence, and that widespread continued raw sap consumption despite ongoing public health messaging underlines how deeply the practice is embedded in affected communities.
The Nipah situation in Bangladesh is a slow-motion demonstration of the same dynamic that produced COVID-19 in Wuhan: a pathogen with pandemic potential, an interface between human behavior and animal reservoirs, inadequate behavioral change despite awareness of risk, and a surveillance system that catches cases but cannot interrupt transmission at the source. The difference is that Nipah, so far, has limited person-to-person transmissibility. If a strain with higher transmissibility emerged — as WHO has acknowledged is theoretically possible — Bangladesh's existing Nipah exposure problem would become a global emergency.
Bangladesh's Live Animal Markets: A Second Risk Layer
Nipah is not the only concern. Bangladesh's live poultry trading networks present a distinct and documented zoonotic risk profile. Research published in Nature's Scientific Reports assessed avian influenza transmission dynamics across Bangladesh's live bird market networks, finding that these networks promoted mixing of chickens from different farming systems and geographical locations, fostering co-circulation of viral strains of diverse origins. The study found that the rise in viral prevalence from farms to markets was substantially influenced by transmission in upstream network nodes — meaning the risk is distributed across the entire trading chain, not concentrated only at the market endpoint.
High Pathogenicity Avian Influenza remains a major threat to Bangladesh's poultry sector, which is a primary source of affordable protein for tens of millions of Bangladeshis. Outbreaks in commercial poultry farms also pose direct zoonotic risks to humans. A 2025 study in Scientific Reports assessed biosecurity practices across commercial poultry farms in Bangladesh, finding systematic weaknesses in containment, hygiene, and disease reporting that elevate spillover risk.
A critical gap identified by researchers studying traditional wet and live animal markets in Bangladesh is legal: there is no specific legislation governing the daily operations of wet markets that addresses biosecurity, personal hygiene, or zoonotic exposure risk. The "Hats and Bazars (Establishment and Acquisition) Act, 2023" governs the administrative formalization of markets — toll collection, law and order, sanitary facilities — but does not establish operational biosecurity standards. The researchers concluded that phasing out live animal sales at traditional wet markets may not be feasible in Bangladesh given socioeconomic impacts, making the development of operational guidelines and regulations the more practical near-term priority.
The China-Bangladesh Connection: More Than Epidemiology
The relevance of China's food safety experience to Bangladesh is not only about pandemic preparedness. It is also about the bilateral relationship between the two countries, which has deepened significantly in recent years through infrastructure investment, defense procurement, and economic partnership. China is Bangladesh's largest import partner. Chinese companies are involved in major infrastructure projects across the country. As the interim government led by Muhammad Yunus navigates Bangladesh's economic and diplomatic reorientation post-2024, the nature of Bangladesh's engagement with China on shared risks — including food safety standards, zoonotic disease surveillance, and pandemic preparedness — has direct relevance to the bilateral agenda.
China's experience with COVID-19 produced significant reforms in its domestic regulatory architecture around food markets and wildlife trade. The lessons from those reforms — what worked, what enforcement gaps emerged, what cultural and economic resistance prevented full implementation — are directly applicable to the South Asian context. Bangladesh's engagement with China through the SAARC framework, bilateral health agreements, and WHO coordination mechanisms creates channels through which this knowledge transfer could be operationalized. Whether it is being used effectively is a separate question.
At the global level, the WHO called in April 2021 for a total ban on the sale of live animals in food markets to prevent future pandemics. That call has not been implemented uniformly anywhere. The practical reality — that wet markets supply food to millions of people and that banning them without replacement would cause immediate economic and nutritional harm — means that the path forward requires regulation, not prohibition. Machine learning-assisted risk scoring, targeted biosecurity interventions, mandatory hygiene standards with enforcement teeth, and real-time disease surveillance integrated with market operations are the toolkit that public health researchers have identified as workable alternatives to blanket bans.
What South Asia Must Learn Now
The lesson from Wuhan is not that China did something uniquely wrong. It is that the conditions which produced COVID-19 — high human-animal interface density, inadequate regulatory oversight of live animal trading, cultural practices that bring humans into close contact with pathogen reservoirs, and surveillance systems that lack the speed and integration to catch spillover events before they become outbreaks — are present across much of South Asia in various forms. Bangladesh has all of these conditions.
The Nipah surveillance system that Bangladesh has built since 2006 is a genuine achievement. Sentinel sites, rapid response teams, diagnostic capacity, and annual outbreak reporting to WHO represent a level of infrastructure that many low-income countries lack. But that surveillance system catches cases after they occur. It does not prevent the bat-sap-human transmission pathway from operating year after year because it cannot override the economic and cultural practices that sustain that pathway. Four fatal cases in the first eight months of 2025, in four different districts across three divisions, indicate a surveillance system working as designed — and a prevention system that has not yet found a way to interrupt the cycle.
For Bangladesh and its South Asian neighbors, the practical agenda flowing from China's experience is specific: establish biosecurity standards with enforcement capacity for live animal markets; invest in One Health surveillance infrastructure that integrates human, animal, and environmental monitoring; accelerate domestic vaccine development for Nipah, which is classified as a priority pathogen by WHO; engage China and international partners on knowledge transfer from post-COVID food safety reforms; and build the regulatory architecture that currently does not exist for wet market operations.
The Wuhan market that the world learned about in early 2020 was not an anomaly. It was the most consequential instance of a problem that is structural, regional, and ongoing. South Asia's equivalent problems are smaller in scale and different in character — but they are not different in kind. Bangladesh's 71.7% Nipah fatality rate is a data point that should concentrate minds. The next pandemic may not begin in a Chinese seafood market. It may begin with a bat feeding in a date palm grove in Rajshahi, and a child drinking the sap the next morning.
win-tk.org is a wintk publication. This article was produced by our editorial team for geopolitical journalism and public health analysis purposes. All data cited is sourced from WHO, peer-reviewed scientific literature, and official government reporting.
