Reconstruction
On 3 August 2018, Chinese authorities confirmed African swine fever at a pig farm in Shenbei New Area, Shenyang, Liaoning Province. It was the first recognized outbreak in China. The disease, caused by African swine fever virus, can kill a high proportion of infected domestic pigs but does not infect people. Its food-system danger came instead from animal deaths, compulsory destruction of exposed herds, movement restrictions, and the virus’s ability to persist in contaminated equipment, vehicles, feed environments, and pork products.
The outbreak spread rapidly through a country that produced more pork than any other. Investigations recorded 176 officially reported outbreaks by 21 April 2020, affecting farms, slaughterhouses, and transported pigs across China. Those notifications are direct administrative evidence, not a complete count of every infected farm or animal. Epidemiological analysis associated outbreaks particularly with inadequately treated swill on small farms and with the mechanical movement of contaminated vehicles and people on larger operations.
Pork did not disappear from Chinese diets, but supplies contracted and prices rose sharply. Official statistics show that pork production fell from 54.04 million tonnes in 2018 to 42.55 million tonnes in 2019, a decline of 21.3 percent. The year-end pig inventory fell 27.5 percent. This affected fresh pork and the many processed foods, dumpling fillings, stir-fries, soups, and braised dishes that ordinarily used it, although changes to particular recipes cannot be assumed without household-level evidence. Consumers and food businesses had economic incentives to use more poultry and other proteins; national poultry-meat production increased 12.3 percent in 2019.
China responded through quarantine, herd destruction, transport controls, disinfection, restrictions on untreated food-waste feeding, production subsidies, reserve-meat releases, and increased imports. Pork imports rose dramatically as domestic supply tightened. Meanwhile, fewer pigs required less soybean meal and compound feed, transmitting the shock to international oilseed markets. USDA analysis in 2019 attributed a projected fall in Chinese soybean imports partly to reduced swine-feed demand. The simultaneous trade dispute with the United States, and then COVID-19 in 2020, complicate attempts to assign every trade movement to African swine fever alone.
The crisis accelerated investment in farm biosecurity, safer feed handling, controlled transport, surveillance, and larger integrated supply chains. These measures increased production costs and could burden smallholders disproportionately. Its modern significance lies not in a new food but in exposing how one livestock disease could alter household protein choices, commodity flows, farm structure, and prices across a globally connected industrial food system.
Historical context
China had a population of about 1.4 billion and an exceptionally large pig economy: 2018 statistics recorded approximately 428 million pigs at year’s end and 54.04 million tonnes of pork production. The outbreak unfolded during the 2018–2019 United States–China trade conflict, which was already disturbing soybean and meat commerce. By early 2020, COVID-19 added disruptions to transport, slaughter, consumption, and international trade, making the later phase of the pork crisis harder to isolate statistically.
Evidence
Written sources
StrongGovernment notifications, veterinary outbreak investigations, national production statistics, and international agricultural reports directly document the recognized outbreaks and market disruption.
Residue chemical
StrongLaboratory molecular testing and viral sequencing identified African swine fever virus in the first recognized Chinese outbreak; this is veterinary diagnostic evidence rather than archaeological residue analysis.
Food identification
StrongThe affected commodity is securely identified as pork from domestic pigs, with national production and inventory statistics documenting the contraction.
Dating
StrongChina’s first officially recognized outbreak was confirmed on 3 August 2018, and published outbreak investigations provide dated records through 2020.
Geographic attribution
StrongThe first recognized outbreak is securely attributed to Shenbei New Area in Shenyang, Liaoning Province, although the epidemic soon became national.
Historical interpretation
ModerateThe broad association among African swine fever, herd contraction, pork-price increases, substitution, imports, and feed-market disruption is well supported. Exact causal shares remain uncertain because the normal pig cycle, environmental farm closures, trade policy, and COVID-19 also affected production and commerce.
Preparation method
LimitedThe crisis clearly affected pork availability, but evidence supplied by national market studies does not directly establish how particular households changed individual recipes or cooking methods.
Sources
- 1.Xintao Zhou, Nan Li, Yuzi Luo, et al. (2018). Emergence of African Swine Fever in China, 2018. Transboundary and Emerging Diseases 65(6): 1482–1484. doi:10.1111/tbed.12989Scientific literature
- 2.Lu Gao, Xiangdong Sun, Honglin Yang, et al. (2021). Epidemic situation and control measures of African Swine Fever Outbreaks in China 2018–2020. Transboundary and Emerging Diseases 68(5): 2676–2686. doi:10.1111/tbed.13968Scientific literature
- 3.Meilin Ma, H. Holly Wang, Yizhou Hua, et al. (2021). African swine fever in China: Impacts, responses, and policy implications. Food Policy 102: 102065. doi:10.1016/j.foodpol.2021.102065Scientific literature
- 4.Clara Frezal, Stephan Hubertus Gay, Claude Nenert (2021). The Impact of the African Swine Fever outbreak in China on global agricultural markets. OECD Food, Agriculture and Fisheries Papers No. 156. doi:10.1787/96d0410d-enModern synthesis
- 5.National Bureau of Statistics of China (2020). Statistical Communiqué of the People's Republic of China on the 2019 National Economic and Social Development. National Bureau of Statistics of China. www.stats.gov.cn/english/PressRelease/202002/t20Modern synthesis
- 6.USDA Foreign Agricultural Service (2019). Falling Hog Numbers Pressure Import Demand for Oilseeds. GAIN Report, Beijing. apps.fas.usda.gov/newgainapi/api/report/downloadModern synthesis
Limitations
- majordescription
The phrase “historical and archaeological synthesis” is inaccurate. The event is supported by veterinary diagnostics, outbreak notifications, epidemiology, government statistics, and economic analysis; archaeological evidence is neither applicable nor documented.
- moderateis technology
African swine fever’s arrival was a biological and food-system crisis, not itself a technology. It prompted technological and procedural changes in biosecurity, feed treatment, surveillance, and transport.
- moderatedate end
African swine fever did not end in China in 2020. The 2018–2020 range is defensible only as the initial outbreak and acute market-disruption phase, not the full duration of the disease’s presence.
- moderatedescription
“Mass culling” describes an important control response but should not be treated as the sole explanation for the national herd contraction. Disease mortality, precautionary slaughter, early marketing, farm exits, and delayed restocking also contributed, while notified outbreak totals do not measure all losses.
