"Hello, we are staff members of the Louxing District Epidemic Prevention and Control Epidemic Investigation and Traceability Command Center. Have you been to Jingu Market recently? Did you go to the market to buy vegetables from 7:00 to 8:00 in the morning?"

"Hello, we are staff members of the Louxing District Epidemic Prevention and Control Epidemic Investigation and Traceability Command Center. Have you been to Jingu Market recently? Did you go to the market to buy vegetables from 7 to 8 in the morning?" In the conference room of

, rows of long tables were filled with phones and computers, and the sound of phone calls and keyboard typing is endless. The current COVID-19 epidemic is very severe and complex. The pressure on "preventing imports from outside" in the central urban area of ​​Loudi is extremely huge. "preventing rebound from inside" is facing severe tests. The risk of social transmission has suddenly increased sharply. In recent days, at the Epidemic Investigation and Traceability Command Center, about 150 Epidemic Investigation personnel have been racing against time all night to track the "trajectory" of the virus to curb the spread of the epidemic quickly.

Epidemiological Investigation , referred to as "epidemic investigation", is an important link in epidemic prevention and control work, and provides an important basis for finding sources of infection and cutting off the path of virus transmission. The epidemic investigation personnel this time are composed of members of the health and health, public security, disease control, industry and information technology departments at the municipal and district levels, as well as professional support forces from all parties, and are set up with five working groups, including the commander-in-chief, a comprehensive group, a on-site investigation team, an epidemic analysis team, and a big data screening team. Each epidemiological investigation personnel fights for an average of 20 hours in a row, and often faces the dual challenges of physical strength and energy.

Liu Min, deputy director of Loudi Municipal Center for Disease Control and Prevention, told reporters that after receiving the epidemic task, the epidemic investigation personnel of the disease control and public security departments responsible for on-site epidemic investigation will first conduct telephone investigation of the subjects, investigate the activity trajectory of the case, which key places have been to, and who have been in contact with key places. After that, the key places will be managed and disinfected, and the persons who are in contact with the case will be judged based on the degree of contact with the case, and the persons involved in the epidemic will be avoided.

"As emergency epidemic investigators, our daily work mainly includes epidemic investigators, chasing the sun, and tracking core close contacts. Since nucleic acid screening is mostly carried out during the day, it is often at night when the results come out. "Chasing the sun" cannot be overnight, and working overnight is the norm. In the face of the epidemic, for everyone's health, we will firmly believe in perseverance." Yan Hongling, the leader of the on-site epidemic investigators, told reporters.

Under the epidemic, epidemiological investigation personnel, epidemic prevention staff and volunteers united as one to build a solid epidemic prevention fortress to ensure the health and safety of the people. At the same time, it also requires the cooperation of the general public, be the first person responsible for their own health, actively implement prevention and control measures, and control this wave of epidemic faster, accurately and stably.