Objective To detect global infectious disease events occurring outside China in November 2024 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 November 2024, 19 infectious diseases were detected to form events or outbreaks in 38 countries worldwide. In terms of importation risk to China, there are 22 medium-risk events; in terms of international travel risk, there are 21 high-risk events and 27 medium-risk events.

Conclusion It is recommended to pay general attention to dengue fever in North America, Europe, and Asia, mpox in the United States, United Kingdom, and Vietnam, chikungunya fever in Brazil, India, and Bangladesh, poliomyelitis in Ethiopia and Pakistan, Group A streptococcal infection in Brazil and Bolivia, eastern equine encephalitis in USA, West Nile virus disease in Germany, and Zika virus disease in India, which may pose import risks. In terms of overseas travel risks, it is recommended that international travelers pay close attention to dengue fever in Oceania, Africa, South America, Asia, and Central America, cholera in six countries including Ghana and Sudan in Africa, chikungunya fever in Brazil and India, Oropuche fever in Brazil, and Zika virus disease in India. Compared to October, general attention should be paid to dengue fever in Cape Verde and Trinidad and Tobago, Oropuche fever in the Cayman Islands, Group A streptococcal infections in Brazil and Bolivia, as well as potential infection risks from unknown diseases in the Democratic Republic of Congo.