Infected person 5: Now living in garden club, Luming Literature, Ronghua Street, Economic Development Zone. February 17, the nucleic acid test result was negative. February1July-20, I went on a business trip to other provinces and attended a training class of a company. On February 20th, the result of nucleic acid test in other provinces was negative. On February 2 1 day, take the G502 train and transfer to the G5 16 train to return to Beijing. On February 22nd, the result of nucleic acid test was positive, and he was transferred to a designated hospital. Based on the epidemic history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed as a confirmed case on the same day, and the clinical grade was mild.

Infected person 6: She lives in Luming Literature Garden Community, Ronghua Street, Economic Development Zone, and is the wife of infected person 5, whose basic situation is the same as that of infected person 5. On February 22nd, the result of nucleic acid test was positive, and he was transferred to a designated hospital. Based on the epidemic history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed as a confirmed case on the same day, and the clinical grade was mild.

Infected person 7: Now living in Runze Yuexi Community, Laiguangying Township, Chaoyang District. February 16 nucleic acid test results were negative. February1July-February 20, I went on a business trip to other provinces and attended a training class of a company. On February 20th, the result of nucleic acid test in other provinces was negative. On February 20th, I took the Z6 train and arrived in Beijing on February 2nd1,and the result of nucleic acid test was negative that day. On February 22, as a close contact of the confirmed case, he was concentrated and isolated. That day, the nucleic acid test was positive and he was transferred to a designated hospital. According to the epidemiological history, clinical manifestations, laboratory examination and imaging examination results, it was diagnosed as a confirmed case with mild clinical classification.

Infected person 8: Now living in Yuejiyuan Community, Yun Tong Street, Tongzhou District. February 17, the nucleic acid test result was negative. On February 2018/20, I went on a business trip to other provinces to attend the company training class, and returned to Beijing on February 20 by flight HU7 188. The result of nucleic acid test was negative on February 2 1 day, and he was isolated at home as a close contact of suspected cases in other provinces that day. On February 22nd, the result of nucleic acid test was positive, and he was transferred to a designated hospital. Based on the epidemic history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed as a confirmed case on the same day and the clinical classification was mild.

Infected person 9: Now living in Yijun Mountain Villa Community, Lisui Town, Shunyi District. February 16, the nucleic acid test result was negative. From February/KLOC-0 to July-20, I went on a business trip to other provinces to attend a company training class. On February 20th, the result of nucleic acid test in other provinces was negative. Take the Z6 train that day and arrive in Beijing on February 2 1. On February 22, as a close contact of the confirmed cases in other provinces, he was concentrated in isolation, during which he developed symptoms such as fever and throat discomfort. That day, his nucleic acid test was positive and he was transferred to a designated hospital. According to the epidemiological history, clinical manifestations, laboratory examination and imaging examination results, it was diagnosed as a confirmed case with mild clinical classification.

Infected person 10: She lives in the community of Beilixiang, Baiwanzhuang, Zhanlan Road, Xicheng District, and is the mother of infected person 2 notified on February 22nd. February 16, the nucleic acid test result was negative. On February1July-20, I went on a business trip to other provinces to attend a company training class. On February 20th, the result of nucleic acid test in other provinces was negative, and he returned to Beijing by G530 train that day. The nucleic acid test results were negative on February 2 1 day, and positive on February 22. The patient was transferred to a designated hospital. According to the epidemiological history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed on February 23, and the clinical grade was mild.

Infected person 1 1: Now living in Pingyuanli community of Baizhifang street in Xicheng District. February 17, the nucleic acid test result was negative. February1July-20, I went on a business trip to other provinces and attended a training class of a company. On February 20, the result of nucleic acid test in other provinces was negative, and I returned to Beijing on February 2 1 flight MU245 1. On February 23rd, the result of nucleic acid test was positive, and he was transferred to a designated hospital. Based on the epidemic history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed as a confirmed case on the same day, and the clinical grade was mild.

Infected person 12: Now living in Fangheng Dongjing Community, Linheli Street, Tongzhou District. On February 7th/KLOC-0, I returned to Beijing by train D 1072. February 8 18, as a close contact of the confirmed cases in Baotou City, Inner Mongolia Autonomous Region, centralized isolation was carried out. On February 16, 18 and 19, the nucleic acid test results were all negative. On February 22nd, the result of nucleic acid test was positive, and he was transferred to a designated hospital. Based on the epidemic history, clinical manifestations, laboratory examination and imaging examination results, the case was diagnosed as a confirmed case on the same day, and the clinical classification was general.

At present, epidemiological investigation and close contact tracking have been carried out, risk points have been investigated, and various risk personnel have been classified and controlled.