Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2 - Guangdong Province, China, May-June 2021

doi:10.46234/ccdcw2021.148

. 2021 Jul 2;3(27):584-586.

doi: 10.46234/ccdcw2021.148.

Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2 - Guangdong Province, China, May-June 2021

Meng Zhang¹, Jianpeng Xiao², Aiping Deng¹, Yingtao Zhang¹, Yali Zhuang¹, Ting Hu¹, Jiansen Li¹, Hongwei Tu¹, Bosheng Li¹, Yan Zhou^{2

3}, Jun Yuan⁴, Lei Luo⁴, Zimian Liang⁵, Youzhi Huang⁶, Guoqiang Ye⁷, Mingwei Cai⁸, Gongli Li⁹, Bo Yang¹⁰, Bin Xu¹¹, Ximing Huang¹², Yazun Cui¹³, Dongsheng Ren¹⁴, Yanping Zhang¹⁵, Min Kang^{1

3}, Yan Li¹

Affiliations

¹ Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
² Guangdong Provincial Institute of Public Health, Guangzhou, Guangdong, China.
³ School of Public Health, Southern Medical University, Guangzhou, Guangdong, China.
⁴ Guangzhou Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁵ Foshan Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁶ Maoming Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁷ Zhanjiang Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁸ Guangzhou Liwan District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁹ Guangzhou Panyu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹⁰ Guangzhou Haizhu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹¹ Guangzhou Yuexiu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹² Foshan Nanhai District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹³ Maoming Dianbai District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹⁴ National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
¹⁵ Chinese Center for Disease Control and Prevention, Beijing, China.

PMID: 34594941
PMCID: PMC8392962
DOI: 10.46234/ccdcw2021.148

Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2 - Guangdong Province, China, May-June 2021

Meng Zhang et al. China CDC Wkly. 2021.

. 2021 Jul 2;3(27):584-586.

doi: 10.46234/ccdcw2021.148.

Authors

Affiliations

¹ Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
² Guangdong Provincial Institute of Public Health, Guangzhou, Guangdong, China.
³ School of Public Health, Southern Medical University, Guangzhou, Guangdong, China.
⁴ Guangzhou Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁵ Foshan Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁶ Maoming Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁷ Zhanjiang Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁸ Guangzhou Liwan District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
⁹ Guangzhou Panyu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹⁰ Guangzhou Haizhu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹¹ Guangzhou Yuexiu District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹² Foshan Nanhai District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹³ Maoming Dianbai District Center for Disease Control and Prevention, Guangzhou, Guangdong, China.
¹⁴ National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
¹⁵ Chinese Center for Disease Control and Prevention, Beijing, China.

PMID: 34594941
PMCID: PMC8392962
DOI: 10.46234/ccdcw2021.148

No abstract available

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Figures

**Figure 1**
The key transmission parameters and transmission dynamics of an outbreak of the COVID-19 delta variant B.1.617.2 in Guangdong Province, China, 2021. (A) The epidemic curve of 167 COVID-19 cases in Guangdong Province — China, May and June, 2021; (B) The mean, median, standard deviation (SD), and the 95% confidence interval (CI) of the incubation period, generation time, and serial interval; (C) The histogram of serial intervals, and the estimated distributions of the incubation period, generation time, and serial interval; (D) The effective reproduction number (R_t) of the ongoing COVID-19 epidemic in the scenarios of strict intervention measures have been implemented in Guangdong from May 27 to June 23, 2021.

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References

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1. Li Q, Guan XH, Wu P, Wang XY, Zhou L, Tong YQ, et al Early transmission dynamics in Wuhan, China, of novel coronavirus–infected pneumonia. N Engl J Med. 2020;382(13):1199–207. doi: 10.1056/NEJMoa2001316. - DOI - PMC - PubMed
1. Hu SX, Wang W, Wang Y, Litvinova M, Luo KW, Ren LS, et al Infectivity, susceptibility, and risk factors associated with SARS-CoV-2 transmission under intensive contact tracing in Hunan, China. Nat Commun. 2021;12(1):1533. doi: 10.1038/s41467-021-21710-6. - DOI - PMC - PubMed
1. The Royal Society. Reproduction number (R) and growth rate (r) of the COVID-19 epidemic in the UK: methods of estimation, data sources, causes of heterogeneity, and use as a guide in policy formulation. Roy Soc 2020. https://royalsociety.org/-/media/policy/projects/set-c/set-covid-19-R-estimates.pdf [2021-06-22]
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Grants and funding

The Key-Area Research and Development Program of Guangdong Province (2019B111103001, 2020B111107001); The National Natural Science Foundation of China (No. 82041030)

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[1] Adam D What scientists know about new, fast-spreading coronavirus variants. Nature. 2021;594(7861):19–20. doi: 10.1038/d41586-021-01390-4. - DOI - PubMed

[2] Adam D What scientists know about new, fast-spreading coronavirus variants. Nature. 2021;594(7861):19–20. doi: 10.1038/d41586-021-01390-4. - DOI - PubMed

[3] Li Q, Guan XH, Wu P, Wang XY, Zhou L, Tong YQ, et al Early transmission dynamics in Wuhan, China, of novel coronavirus–infected pneumonia. N Engl J Med. 2020;382(13):1199–207. doi: 10.1056/NEJMoa2001316. - DOI - PMC - PubMed

[4] Li Q, Guan XH, Wu P, Wang XY, Zhou L, Tong YQ, et al Early transmission dynamics in Wuhan, China, of novel coronavirus–infected pneumonia. N Engl J Med. 2020;382(13):1199–207. doi: 10.1056/NEJMoa2001316. - DOI - PMC - PubMed

[5] Hu SX, Wang W, Wang Y, Litvinova M, Luo KW, Ren LS, et al Infectivity, susceptibility, and risk factors associated with SARS-CoV-2 transmission under intensive contact tracing in Hunan, China. Nat Commun. 2021;12(1):1533. doi: 10.1038/s41467-021-21710-6. - DOI - PMC - PubMed

[6] Hu SX, Wang W, Wang Y, Litvinova M, Luo KW, Ren LS, et al Infectivity, susceptibility, and risk factors associated with SARS-CoV-2 transmission under intensive contact tracing in Hunan, China. Nat Commun. 2021;12(1):1533. doi: 10.1038/s41467-021-21710-6. - DOI - PMC - PubMed

[7] The Royal Society. Reproduction number (R) and growth rate (r) of the COVID-19 epidemic in the UK: methods of estimation, data sources, causes of heterogeneity, and use as a guide in policy formulation. Roy Soc 2020. https://royalsociety.org/-/media/policy/projects/set-c/set-covid-19-R-estimates.pdf [2021-06-22]

[8] The Royal Society. Reproduction number (R) and growth rate (r) of the COVID-19 epidemic in the UK: methods of estimation, data sources, causes of heterogeneity, and use as a guide in policy formulation. Roy Soc 2020. https://royalsociety.org/-/media/policy/projects/set-c/set-covid-19-R-estimates.pdf [2021-06-22]

[9] Campbell F, Archer B, Laurenson-Schafer H, Jinnai Y, Konings F, Batra N, et al Increased transmissibility and global spread of SARS-CoV-2 variants of concern as at June 2021. Euro Surveill. 2021;26(24):pii=2100509. doi: 10.2807/1560-7917.ES.2021.26.24.2100509. - DOI - PMC - PubMed

[10] Campbell F, Archer B, Laurenson-Schafer H, Jinnai Y, Konings F, Batra N, et al Increased transmissibility and global spread of SARS-CoV-2 variants of concern as at June 2021. Euro Surveill. 2021;26(24):pii=2100509. doi: 10.2807/1560-7917.ES.2021.26.24.2100509. - DOI - PMC - PubMed

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Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2 - Guangdong Province, China, May-June 2021

Affiliations

Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2 - Guangdong Province, China, May-June 2021

Authors

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