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Qiuyue Ma, Jue Liu, Qiao Liu, Liangyu Kang, Liu Runqing, Wenzhan Jing, Yu Wu, Min Liu
Importance: Asymptomatic infections are potential sources of transmission for COVID-19. Objective: To evaluate the percentage of asymptomatic infections among individuals undergoing testing (tested population) and those with confirmed COVID-19 (confirmed population). Data Sources: PubMed, EMBASE, and ScienceDirect were searched on February 4, 2021. Study Selection: Cross-sectional studies, cohort studies, case series studies, and case series on transmission reporting the number of asymptomatic infections among the tested and confirmed COVID-19 populations that were published in Chinese or English were included. Data Extraction and Synthesis: This meta-analysis was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline. Random-effects models were used to estimate the pooled percentage and its 95% CI. Three researchers performed the data extraction independently. Main Outcomes and Measures: The percentage of asymptomatic infections among the tested and confirmed populations. Results: Ninety-five unique eligible studies were included, covering 29 776 306 individuals undergoing testing. The pooled percentage of asymptomatic infections among the tested population was 0.25% (95% CI, 0.23%-0.27%), which was higher in nursing home residents or staff (4.52% [95% CI, 4.15%-4.89%]), air or cruise travelers (2.02% [95% CI, 1.66%-2.38%]), and pregnant women (2.34% [95% CI, 1.89%-2.78%]). The pooled percentage of asymptomatic infections among the confirmed population was 40.50% (95% CI, 33.50%-47.50%), which was higher in pregnant women (54.11% [95% CI, 39.16%-69.05%]), air or cruise travelers (52.91% [95% CI, 36.08%-69.73%]), and nursing home residents or staff (47.53% [95% CI, 36.36%-58.70%]). Conclusions and Relevance: In this meta-analysis of the percentage of asymptomatic SARS-CoV-2 infections among populations tested for and with confirmed COVID-19, the pooled percentage of asymptomatic infections was 0.25% among the tested population and 40.50% among the confirmed population. The high percentage of asymptomatic infections highlights the potential transmission risk of asymptomatic infections in communities.
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Ma, Q., Liu, J., Liu, Q., Kang, L., Runqing, L., Jing, W., Wu, Y., & Liu, M. (2021). Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis. JAMA Network Open, 4(12), e2137257. https://doi.org/10.1001/jamanetworkopen.2021.37257
Ma, Qiuyue, et al. "Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis." JAMA Network Open, vol. 4, no. 12, 2021, pp. e2137257, https://doi.org/10.1001/jamanetworkopen.2021.37257.
Ma, Qiuyue, Jue Liu, Qiao Liu, Liangyu Kang, Liu Runqing, Wenzhan Jing, Yu Wu, and Min Liu. "Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis." JAMA Network Open 4, no. 12 (2021): e2137257. https://doi.org/10.1001/jamanetworkopen.2021.37257.
Ma Q., Liu J., Liu Q. [и др.] Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis // JAMA Network Open. — 2021. — Vol. 4, № 12. — P. e2137257. — URL: https://doi.org/10.1001/jamanetworkopen.2021.37257
@article{ma2021global,
title = {{Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis}},
author = {Qiuyue Ma and Jue Liu and Qiao Liu and Liangyu Kang and Liu Runqing and Wenzhan Jing and Yu Wu and Min Liu},
journal = {JAMA Network Open},
year = {2021},
volume = {4},
number = {12},
pages = {e2137257},
doi = {10.1001/jamanetworkopen.2021.37257},
url = {https://doi.org/10.1001/jamanetworkopen.2021.37257}
}TY - JOUR AU - Ma, Qiuyue AU - Liu, Jue AU - Liu, Qiao AU - Kang, Liangyu AU - Runqing, Liu AU - Jing, Wenzhan AU - Wu, Yu AU - Liu, Min TI - Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis JO - JAMA Network Open VL - 4 IS - 12 SP - e2137257 PY - 2021 DA - 2021/12/14 DO - 10.1001/jamanetworkopen.2021.37257 UR - https://doi.org/10.1001/jamanetworkopen.2021.37257 ER -
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