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Zhonghua Yu Fang Yi Xue Za Zhi ; 56(12): 1795-1802, 2022 Dec 06.
Article in Chinese | MEDLINE | ID: covidwho-2201072


Objective: To trace and characterize the whole genome of SARS-CoV-2 of confirmed cases in the outbreak of COVID-19 on July 31, 2021 in Henan Province. Method: Genome-wide sequencing and comparative analysis were performed on positive nucleic acid samples of SARS-CoV-2 from 167 local cases related to the epidemic on July 31, 2021, to analyze the consistency and evolution of the whole genome sequence of virus. Results: Through high-throughput sequencing, a total of 106 cases of SARS-CoV-2 whole genome sequences were obtained. The results of genome analysis showed that the whole genome sequences of 106 cases belonged to the VOC/Delta variant strain (B.1.617.2 clade), and the whole genome sequences of 106 cases were shared with the genomes of 3 imported cases from Myanmar admitted to a hospital in Zhengzhou. On the basis of 45 nucleotide sites, 1-5 nucleotide variation sites were added, and the genome sequence was highly homologous. Conclusion: Combined with the comprehensive analysis of viral genomics, transmission path simulation experiments and epidemiology, it is determined that the local new epidemic in Henan Province is caused by imported cases in the nosocomial area, and the spillover has caused localized infection in the community. At the same time, it spills over to some provincial cities and results in localized clustered epidemics.

COVID-19 , Epidemics , Humans , SARS-CoV-2/genetics , Genome, Viral , Phylogeny
View ; 2(2):10, 2021.
Article in English | Web of Science | ID: covidwho-1411071


Nanotechnology-basedin vitro diagnostics (nanoIVDs) are widely studied for disease diagnostics with promising sensitivity, specificity, and convenience. However, it is still a major challenge for both regulatory authorities and scientific researchers to accelerate the clinical translation of such an innovative technology. Herein, this perspective discussed the benefits and challenges of nanoIVDs as well as the administration considerations on the distinguish features of nanoIVDs by regulatory authorities, so as to further achieve the evaluation, translation, and application of nanoIVD products.