[1] World Health Organizations. WHO coronavirus disease (COVID-19) dashboard. https://covid19.who.int.[2020-12-31].https://covid19.who.int
[2] Li ZJ, Chen QL, Feng LZ, Rodewald L, Xia YY, Yu HL, et al. Active case finding with case management: the key to tackling the COVID-19 pandemic. Lancet 2020;396(10243):63 − 70. http://dx.doi.org/10.1016/S0140-6736(20)31278-2CrossRef
[3] Zhao X, Mao LL, Zhang JQ, Zhang Y, Song Y, Bo ZJ, et al. Notes from the field: reemergent cases of COVID-19 — Dalian City, Liaoning Province, China, July 22, 2020. China CDC Wkly 2020;2(34):658 − 60. http://dx.doi.org/10.46234/ccdcw2020.182CrossRef
[4] Pang XH, Ren LL, Wu SS, Ma WT, Yang J, Di L, et al. Cold-chain food contamination as the possible origin of COVID-19 resurgence in Beijing. Natl Sci Rev 2020;7(12):1861 − 4. http://dx.doi.org/10.1093/nsr/nwaa264CrossRef
[5] COVID-19 Field Response Group, Laboratory Testing Group, Zhang Y. Outbreak reports: the source of infection of the 137th confirmed case of COVID-19 — Tianjin Municipality, China, June 17, 2020. China CDC Wkly 2020;2(27):507 − 10. http://dx.doi.org/10.46234/ccdcw2020.122CrossRef
[6] Fang FH, Song Y, Hao LP, Nie K, Sun XD. Notes from the field: a case of COVID-19 detected in a cargo worker at Pudong airport — Shanghai Municipality, China, November 8, 2020. China CDC Wkly 2020;2(47):910 − 1. http://dx.doi.org/10.46234/ccdcw2020.246CrossRef
[7] Wang J, Zhao J, Zhao X, Guo ZG, Song Y, Ma X, et al. Notes from the field: the first case of asymptomatic infection of COVID-19 — Kashgar Prefecture, Xinjiang Uygur Autonomous Region, China, October, 2020. China CDC Wkly 2020;2(45):882 − 3. http://dx.doi.org/10.46234/ccdcw2020.233CrossRef
[8] Waltenburg MA, Victoroff T, Rose CE, Butterfield M, Jervis RH, Fedak KM, et al. Update: COVID-19 among workers in meat and poultry processing facilities - United States, April-May 2020. Morb Mortal Wkly Rep 2020;69(27): 887-92. https://www.cdc.gov/mmwr/volumes/69/wr/mm6927e2.htm.https://www.cdc.gov/mmwr/volumes/69/wr/mm6927e2.htm
[9] Fisher D, Reilly A, Zheng AKE, Cook AR, Anderson DE. Seeding of outbreaks of COVID-19 by contaminated fresh and frozen food. BioRxiv 2020. http://dx.doi.org/10.1101/2020.08.17.255166.http://dx.doi.org/10.1101/2020.08.17.255166
[10] Chinese Center for Disease Control and Prevention. Live COVID-19 virus was successfully isolated and cultured from samples from imported frozen sea-food packaging by China CDC. http://www.chinacdc.cn/jkzt/crb/zl/szkb_11803/jszl_2275/202010/t20201017_222144.html. [2020-12-31]. (In Chinese). http://www.chinacdc.cn/jkzt/crb/zl/szkb_11803/jszl_2275/202010/t20201017_222144.html
[11] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Guidance for normalizing prevention and control of COVID-19 outbreaks in key locations, key units, and key populations in low-risk areas in summer (revised edition): [2020]-192. http://www.gov.cn/xinwen/2020-06/18/content_5520230.htm. [2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-06/18/content_5520230.htm
[12] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Guidelines on prevention and control of COVID-19 for meat processing facilities: [2020]-216. http://www.gov.cn/xinwen/2020-07/23/content_5529616.htm. [2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-07/23/content_5529616.htm
[13] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Technical guidance for COVID-19 prevention and control in farmers’ markets: [2020]-223. http://www.gov.cn/xinwen/2020-08/12/content_5534325.htm.[2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-08/12/content_5534325.htm
[14] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Technical guidance for prevention and control of COVID-19 in cold food production chain and Technical guidance for disinfection in cold food production chain to prevent and control of COVID 19: [2020]-245. http://www.gov.cn/xinwen/2020-10/27/content_5555114.htm.[2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-10/27/content_5555114.htm
[15] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Guidance on strengthening the detection of COVID-19 virus in the cold-food chain: [2020]-220. https://www.waizi.org.cn/doc/94423.html. (2020-7-29). (In Chinese). https://www.waizi.org.cn/doc/94423.html
[16] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Technical guidance of environmental monitoring of COVID-19 virus in farmers’ markets: [2020]-221. http://www.gov.cn/zhengce/zhengceku/2020-07/30/content_5531368.htm. [2020-12-31]. (In Chinese). http://www.gov.cn/zhengce/zhengceku/2020-07/30/content_5531368.htm
[17] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Work plan for preventive and comprehensive disinfection of imported cold-chain food: [2020]-255. http://www.gov.cn/xinwen/2020-11/09/content_5559179.htm. [2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-11/09/content_5559179.htm
[18] The Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. Notice on further improving tracking management of cold-chain food: [2020]-263. http://www.gov.cn/xinwen/2020-11/29/content_5565694.htm. [2020-12-31]. (In Chinese). http://www.gov.cn/xinwen/2020-11/29/content_5565694.htm
[19] National Health Commission of the People’s Republic of China. Introduction of cold-chain food and food safety in autumn and winter at the press conference of the Joint Prevention and Control Mechanism of the State Council of the People’s Republic of China. on November 25, 2020. http://www.nhc.gov.cn/xwzb/webcontroller.do?titleSeq=11351&gecstype=1. [2020-12-31]. (In Chinese). http://www.nhc.gov.cn/xwzb/webcontroller.do?titleSeq=11351&gecstype=1