Abstract:
Objective To detect global infectious disease events occurring outside China in April 2026 and assess the importation risk to China and international travel risk.
Methods Utilizing open-source intelligence on the internet, this study conducts event-based surveillance of priority infectious diseases and adopts the risk matrix methodology to build an indicator system by integrating disease-, country- and event-specific indicators in terms of transmission likelihood and severity of consequences in order to assess the risk of the importation and the risk of international travel.
Results In April 2026, 17 infectious diseases were detected to form events or outbreaks in 40 countries worldwide. In terms of importation risk to China, there is 1 high-risk event and 29 medium-risk events; in terms of international travel risk, there are 1- high-risk events and 24 medium-risk events.
Conclusion For import risk, it is recommended to pay close attention to the dengue fever outbreak in Vietnam, and pay general attention to diphtheria, dengue fever, chikungunya, meningococcal meningitis, measles, hand, foot and mouth disease, and Zika virus disease in specific countries. For overseas travel risk, it is recommended to pay close attention to dengue fever in Maldives and Peru, cholera in the Democratic Republic of the Congo and Mozambique, chikungunya in French Guiana, and measles outbreaks in Pakistan, Bangladesh, the Democratic Republic of the Congo, the Philippines, and South Africa.
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