From Insecticide to Vaccination?: The History of Japanese Encephalitis Research and Control in South Korea.

This article examines the history of Japanese encephalitis (JE) research and disease control in South Korea from the post-liberation era through the 1990s, focusing on the gap between the accumulation of scientific knowledge and its translation into effective public health policy. Drawing on epidemiological reports, government documents, medical journals, and newspaper sources, this study analyzes three interconnected dimensions of Korea's JE history. First, it traces how knowledge about JE was produced through transnational networks-including U.S. military medical laboratories, the World Health Organization's malaria eradication program, and Korean scientists trained abroad. As such, this body of knowledge was externally structured, rather than through an independent domestic research infrastructure, and thus it failed to translate consistently into government prevention policy. Second, this study examines how DDT-centered vector control became the principal instrument of JE prevention, and how the repeated limitations of insecticide-based interventions helped produce a discourse that attributed outbreaks to rural backwardness. This narrative deflected attention from the structural deficiencies of the prevention system itself. Finally, this study shows that vaccination-long anticipated as the solution to JE-also faced its own institutional obstacles. The failure to secure adequate funding, the privatization of vaccine production, the shift to fee-based individual vaccination, and the absence of mandatory vaccination requirements collectively delayed stable preventive coverage until the mid-1980s, when rising vaccination rates finally produced a sustained decline in JE incidence. Taken together, this history demonstrates that the management of JE in modern Korea was shaped less by the availability of scientific knowledge or biomedical technology than by the presence or absence of the institutional foundations necessary to operationalize it.