Zhao Lian, deputy director of Dalian Municipal Health Commission, said,
The factory area, cold storage and 18 directly operated stores of seafood processing enterprise where case 1 is located were closed. Food and environmental samples from food, processing workshop, dormitory, canteen, public toilet and other places were collected. At present, many samples were positive.
Environmental nucleic acid sampling was also carried out in the workshop, canteen and public toilet of case 2, and the results were negative.
1318 samples of the external environment and product packaging of the market stores involved in the case were collected and sent to Dalian CDC for testing.