Overseas, especially in some developed countries, there are relatively few applications of blockchain technology in the field of epidemic prevention. In contrast, China fully leveraged the advantages of blockchain during the epidemic and realized many innovative applications such as virus traceability, information tracking, and medical resource management. However, due to various reasons in overseas countries, such as high technology access thresholds and unclear regulatory policies, the application scope of blockchain in epidemic prevention is limited.

In this context, overseas countries face an important problem in blockchain epidemic prevention, that is, the lack of government image. In the process of promoting the application of blockchain technology in epidemic prevention, the government often faces public concerns about privacy protection, data security and other aspects. Once these concerns are amplified, they may affect the government's image and even trigger social doubts and resistance. Therefore, how to effectively promote the application of blockchain in epidemic prevention while ensuring data security has become an urgent problem that overseas countries need to solve.

In order to solve the government image problem in overseas blockchain epidemic prevention, on the one hand, the government needs to strengthen the guidance and supervision of blockchain technology to ensure its legal and compliant application in epidemic prevention. On the other hand, the government also needs to strengthen communication and interaction with the public, increase popularization and explanation of blockchain technology, and eliminate public doubts and misunderstandings. Only when the government and the public work together can we effectively promote the application of blockchain in epidemic prevention, enhance the government's image, and enhance social trust and recognition.

In general, although the scope of overseas blockchain epidemic prevention is limited, with the continuous development of technology and the gradual improvement of the policy environment, it is believed that the application of blockchain in epidemic prevention will be further promoted and deepened in the future. The construction and maintenance of government image is the key to promoting the role of blockchain in epidemic prevention. It is hoped that governments of all countries can realize this, take effective measures, jointly respond to global public health challenges, and make greater contributions to human health and well-being.

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