COVID-19 is a major global public health challenge and difficult to control in a short time completely. To prevent the COVID-19 epidemic from continuing to worsen, global scientific research institutions have actively carried out studies on COVID-19, thereby effectively improving the prevention, monitoring, tracking, control, and treatment of the epidemic. However, the COVID-19 electronic medical records (CEMRs) among hospitals worldwide are managed independently. With privacy consideration, CEMRs cannot be made public or shared, which is not conducive to in-depth and extensive research on COVID-19 by medical research institutions. In addition, even if new research results are developed, the disclosure and sharing process is slow. To address this issue, we propose a blockchain-based medical research support platform, which can provide efficient and privacy-preserving data sharing against COVID-19. First, hospitals and medical research institutions are treated as nodes on the alliance chain, so consensus and data sharing among the nodes is achieved. Then, COVID-19 patients, doctors, and researchers need to be authenticated in various institutes. Moreover, doctors and researchers need to be registered with the Fabric certificate authority. The CEMRs for COVID-19 patients uses the blockchain's pseudonym mechanism to protect privacy. After that, doctors upload CEMRs on the alliance chain, and researchers can obtain CEMRs from the alliance chain for research. Finally, the research results will be published on the blockchain for doctors to use. The experimental results show that the read and write performance and security performance on the alliance chain meet the requirements, which can promote the wide application of scientific research results against COVID-19.

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针对COVID-19的高效且保护隐私的医学研究支持平台：基于区块链的方法

COVID-19是全球主要的公共卫生挑战，很难在短时间内完全控制。为了防止COVID-19流行病继续恶化，全球科研机构已经积极开展了关于COVID-19的研究，从而有效地改善了对流行病的预防，监测，跟踪，控制和治疗。但是，全球医院之间的COVID-19电子病历（CEMR）是独立管理的。出于隐私考虑，CEMR不能公开或共享，这不利于医学研究机构对COVID-19进行深入而广泛的研究。另外，即使开发出新的研究结果，公开和共享过程也很慢。为了解决这个问题，我们提出了一个基于区块链的医学研究支持平台，可以针对COVID-19提供高效且具有隐私保护的数据共享。首先，将医院和医学研究机构视为联盟链上的节点，从而实现节点之间的共识和数据共享。然后，需要在各个机构中对COVID-19的患者，医生和研究人员进行身份验证。此外，医生和研究人员需要向Fabric证书颁发机构注册。用于COVID-19患者的CEMR使用区块链的假名机制来保护隐私。之后，医生将CEMR上传到联盟链中，研究人员可以从联盟链中获取CEMR进行研究。最后，研究结果将发布在区块链上供医生使用。