集中拉网式大排查
2020年2月17日至19日, 武汉市展开集中拉网式大排查, 对各区各街道辖区居民进行筛查甄别，坚持“不落一户、不漏一人”。这是坚持人民生命至上、遵循应收尽收原则的具体举措。
集中拉网式大排查以社区为基础，彻底排查清“四类人员”（即确诊患者、疑似患者、无法排除感染可能的发热患者、确诊患者的密切接触者），推动落实“五个百分之百”工作目标（即确诊患者百分之百应收尽收、疑似患者百分之百核酸检测、发热病人百分之百进行检测、密切接触者百分之百隔离、小区村庄百分之百实行24小时封闭管理）。
这次大排查运用人工智能技术，大大提高了工作效率，在3天时间内完成3300多个社区、村湾近1000万人口的清底排查。在此基础上，通过大数据平台整合归并医院、疾控中心、医保、公安、民政、通信运营商等相关单位的信息数据，对“四类人员”有针对性地开展核酸检测、流行病调查，精准快速地锁定密切接触者，并在第一时间实施隔离，形成了对传染源的有效锁定和有效阻断。
Massive Dragnet Screening of Potential Virus Carriers
From February 17 to 19, Wuhan launched a massive dragnet screening of potential virus carriers among its residents in every community, "leaving no one unscreened." This follows the belief that "saving lives is of paramount importance," and the principle of getting all confirmed cases hospitalized for treatment.
This large-scale screening was conducted in search of the four groups of people (i.e. confirmed cases, suspected cases, febrile patients who cannot rule out the possibility of infection, and close contacts), in order to ensure 100 percent of admission for confirmed cases, 100 percent of nucleic acid tests for suspected cases, 100 percent of diagnosis for febrile patients, 100 percent of isolation for close contacts, and 100 percent of 24-hour close-off management of communities and villages.
By the use of AI technology, the investigation was conducted with great efficiency, and reached approximately 10 million people in more than 3,300 communities and villages within three days. Based on the big data platform, the information collected was integrated with the records kept in the hospitals, disease control centers, medical insurance agencies, public security and civil affairs authorities, telecommunication carriers and other relevant units. Targeted nucleic acid tests and epidemiological studies were carried out on the four groups of people, which helped to accurately and rapidly find close contacts and isolate them without delay, therefore effectively identifying and blocking the infection source.