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Role of presymptomatic transmission of COVID-19: evidence from Beijing, China.
J Epidemiol Community Health. 2021 01; 75(1):84-87.JE

Abstract

BACKGROUND

The presymptomatic transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been documented in limited clusters, and it is predicted through modelling. However, there is a lack of evidence from observations with a large sample size.

METHODS

We used data from meticulous contact tracing of people exposed to cases of SARS-CoV-2 to estimate the proportion of cases that result from the presymptomatic transmission of the virus in Beijing during January 2020 and February 2020.

RESULTS

The results showed that presymptomatic transmission occurred in at least 15% of 100 secondary COVID-19 cases. The earliest presymptomatic contact event occurred 5 days prior to the index case's onset of symptoms, and this occurred in two clusters.

CONCLUSIONS

The finding suggested that the contact tracing period should be earlier and highlighted the importance of preventing transmission opportunities well before the onset of symptoms.

Authors+Show Affiliations

Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.University of New South Wales, Sydney, Australia.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.University of Nevada Las Vegas, Las Vegas, Nevada, USA.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China.Beijing Center for Disease Prevention and Control & Beijing Research Center for Preventive Medicine, Beijing, China bjcdcxm@126.com.University of New South Wales, Sydney, Australia. Arizona State University, Tempe, Arizona, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32855261

Citation

Zhang, Yi, et al. "Role of Presymptomatic Transmission of COVID-19: Evidence From Beijing, China." Journal of Epidemiology and Community Health, vol. 75, no. 1, 2021, pp. 84-87.
Zhang Y, Muscatello D, Tian Y, et al. Role of presymptomatic transmission of COVID-19: evidence from Beijing, China. J Epidemiol Community Health. 2021;75(1):84-87.
Zhang, Y., Muscatello, D., Tian, Y., Chen, Y., Li, S., Duan, W., Ma, C., Sun, Y., Wu, S., Ge, L., Yang, P., Jia, L., Wang, Q., & MacIntyre, C. R. (2021). Role of presymptomatic transmission of COVID-19: evidence from Beijing, China. Journal of Epidemiology and Community Health, 75(1), 84-87. https://doi.org/10.1136/jech-2020-214635
Zhang Y, et al. Role of Presymptomatic Transmission of COVID-19: Evidence From Beijing, China. J Epidemiol Community Health. 2021;75(1):84-87. PubMed PMID: 32855261.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Role of presymptomatic transmission of COVID-19: evidence from Beijing, China. AU - Zhang,Yi, AU - Muscatello,David, AU - Tian,Yi, AU - Chen,Yanwei, AU - Li,Shuang, AU - Duan,Wei, AU - Ma,Chunna, AU - Sun,Ying, AU - Wu,Shuangsheng, AU - Ge,Lin, AU - Yang,Peng, AU - Jia,Lei, AU - Wang,Quanyi, AU - MacIntyre,Chandini Raina, Y1 - 2020/08/27/ PY - 2020/05/23/received PY - 2020/07/21/revised PY - 2020/07/28/accepted PY - 2020/8/29/pubmed PY - 2020/12/29/medline PY - 2020/8/29/entrez KW - Communicable diseases KW - control of diseases KW - public health policy SP - 84 EP - 87 JF - Journal of epidemiology and community health JO - J Epidemiol Community Health VL - 75 IS - 1 N2 - BACKGROUND: The presymptomatic transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been documented in limited clusters, and it is predicted through modelling. However, there is a lack of evidence from observations with a large sample size. METHODS: We used data from meticulous contact tracing of people exposed to cases of SARS-CoV-2 to estimate the proportion of cases that result from the presymptomatic transmission of the virus in Beijing during January 2020 and February 2020. RESULTS: The results showed that presymptomatic transmission occurred in at least 15% of 100 secondary COVID-19 cases. The earliest presymptomatic contact event occurred 5 days prior to the index case's onset of symptoms, and this occurred in two clusters. CONCLUSIONS: The finding suggested that the contact tracing period should be earlier and highlighted the importance of preventing transmission opportunities well before the onset of symptoms. SN - 1470-2738 UR - https://www.unboundmedicine.com/medline/citation/32855261/Role_of_presymptomatic_transmission_of_COVID_19:_evidence_from_Beijing_China_ DB - PRIME DP - Unbound Medicine ER -