Abstract:
Objectives To detect global infectious disease events occurring outside mainland China in July 2025 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 July 2025, 18 infectious diseases were detected to form events or outbreaks in 36 countries worldwide. In terms of importation risk to China, there are 4 high-risk events and 22 medium-risk events; in terms of international travel risk, there are 12 high-risk events and 30 medium-risk events.
Conclusion It is recommended to focus on the potential import risks posed by dengue fever outbreaks in Bangladesh and Vietnam, cholera outbreaks in the United States, and chikungunya fever outbreaks in France. Regarding overseas travel risks, it is advised that travelers abroad pay close attention to dengue fever outbreaks in Costa Rica, Mexico, Bangladesh and Vietnam, cholera outbreaks in the Democratic Republic of the Congo, Mozambique, South Sudan, Nigeria, Sudan, and France, chikungunya fever outbreaks in French Réunion Island, Oropouche fever in Brazil, and Nipah virus disease in India. Compared to June, in July, general attention should also be paid to the potential infection risks posed by pneumonic plague in the United States, febrile thrombocytopenia syndrome in Russia and Nipah virus disease in India.
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