| 4 | Contamination and Transmission of SARS-CoV-2 Variants in Cold-Chain Food and Food Packaging显示文摘INTRODUCTION The emergence of coronavirus disease 2019(COVID-19)has posed a significant threat to global health and well-being.Vaccination serves as a vital strategy in preventing and mitigating the severity of clinical symptoms.However,due to natural selection,severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has evolved,resulting in various mutations(1).Currently,the World Health Organization(WHO)has identified five variants of concern,including Alpha,Beta,Gamma,Delta,and Omicron(2).Of these,only Omicron remains in circulation and has already produced nearly one thousand sub-lineages or subvariants.These mutating variants demonstrate increased infectivity and vaccine breakthrough rates,as well as more pronounced antibody escape rates(3). | Gang Li Yeru Wang Zhenhua Wang Yibaina Wang Yan Qi Li Bai Zhaoping Liu Ning Li | 2023 | China CDC weekly2023，5，22： | 0 |
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