PinWan news on March 6, according to CCTV news, the Health Bureau of Huangdao District, Qingdao reported the tracing results of the epidemic on March 6. The details are as follows: at present, the tracing work of the epidemic has come to an end. After careful investigation and analysis of human transmission, material transmission and environment, the epidemic is a small-scale family gathering and gathering of relatives and friends caused by accidental infection. The cause of the epidemic is the infection of personnel caused by receiving express delivery from epidemic areas in other provinces, excluding other human transmission The possibility of infection caused by material transmission and environment. Although no homology was found between the Omicron virus and the domestic known virus gene sequence, it is not a new Omicron variant.