摘要当前我国新发现HIV感染者经性传播模式较为复杂。开展HIV溯源和分子网络分析，尽可能早期发现传染源并开展精准防控，对遏制艾滋病传播具有重大意义。本期重点号结合目前HIV溯源、分子网络分析、精准发现与精准防控进展，重点报告2017-2020年宁波市HIV/AIDS流行病学特征，通过HIV溯源调查分析HIV/AIDS与其性伴的HIV传播关系，将社会网络和分子网络相结合分析HIV传播模式，为我国艾滋病精准发现和精准防控的应用型研究提供科学依据，推动我国艾滋病的科学防控。

abstractsThe current sexual transmission of newly infected HIV cases is complicated in China. It is crucial for interrupting HIV transmission by HIV tracing and molecular network analysis,conducting early detection and precise prevention among HIV-positive individuals. The articles in this issue focused on the global situation of HIV tracing, and molecular network analysis in promoting accurate detection and prevention of AIDS started from analyzing the reported epidemiological characteristics of HIV/AIDS in Ningbo city from 2017 to 2020. Relations of HIV transmission between HIV positive individuals and sex partners by tracing investigation were also, analyzed. Data on HIV transmission mode by combining social and molecular networks were gathered to provide evidence for applied research on precise detection, prevention, and control of AIDS.