SynthesisInternational journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases2021
The epidemiological and radiographical characteristics of asymptomatic infections with the novel coronavirus (COVID-19): A systematic review and meta-analysis.
Synthesis in International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 4 of them syntheses that pooled it.
What it found
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Who cites it
31 citing papers in PubMed, 4 syntheses or guidelines pooled it, 51 citations in OpenAlex.
- Epidemiological, Radiographical, and Laboratorial Characteristics of Chinese Asymptomatic Cases With COVID-19: A Systematic Review and Meta-Analysis.Frontiers in public health · 2022Pooled it
- Pooled it
- Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis: A Systematic Review and Meta-analysis.JAMA network open · 2021Pooled it
- Diagnostic value of chest computed tomography imaging for COVID-19 based on reverse transcription-polymerase chain reaction: a meta-analysis.Infectious diseases of poverty · 2021Pooled it
- Cognitively-plausible reinforcement learning in epidemiological agent-based simulations.Frontiers in epidemiology · 2025Article
- An after-action review of COVID-19 cases and mitigation measures at US Mission India, March 2020-July 2021.PLOS global public health · 2025Article
- Article
- SARS-CoV-2 wastewater surveillance at two university campuses: lessons learned and insights on intervention strategies for public health guidance.Journal of water and health · 2024Article
- Cohort profile: follow-up of a household cohort throughout five epidemic waves of SARS-CoV-2 in Rio de Janeiro, Brazil.Cadernos de saude publica · 2024Article
- The effect of variation of individual infectiousness on SARS-CoV-2 transmission in households.eLife · 2023Article
- Simulating potential outbreaks of Delta and Omicron variants based on contact-tracing data: A modelling study in Fujian Province, China.Infectious Disease Modelling · 2023Article
- Data-driven multiscale dynamical framework to control a pandemic evolution with non-pharmaceutical interventions.PloS one · 2023Article
- Analysis of Symptom Spectra and Associated Factors Among 536 Respondents During the COVID-19 Epidemic in China: A Cross-Sectional Study.Journal of multidisciplinary healthcare · 2023Article
- Rates of Asymptomatic COVID-19 Infection and Associated Factors in Olmsted County, Minnesota, in the Prevaccination Era.Mayo Clinic proceedings. Innovations, quality & outcomes · 2022Article
- Prevalence of Asymptomatic SARS-CoV-2 Infection in Japan.JAMA network open · 2022Article
- Genome-wide association study of SARS-CoV-2 infection in Chinese population.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2022Article
- Clinical presentation of COVID-19 at the time of testing and factors associated with pre-symptomatic cases in Cameroon.IJID regions · 2022Article
- A pre-symptomatic incubation model for precision strategies of screening, quarantine, and isolation based on imported COVID-19 cases in Taiwan.Scientific reports · 2022Article
- Improving participation and engagement with a COVID-19 surveillance programme in an outpatient setting.BMJ open quality · 2022Article
- Asymptomatic and pre-symptomatic infection in Coronavirus Disease 2019 pandemic.Medical review (2021) · 2022Review
Corrections and comments
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Authors and funding
16 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe role of asymptomatic infections in the transmission of COVID-19 have drawn considerable attention. Here, we performed a meta-analysis to summarize the epidemiological and radiographical characteristics of asymptomatic infections associated with COVID-19.
methodsData on the epidemiological and radiographical characteristics of asymptomatic infections were extracted from the existing literature. Pooled proportions with 95% confidence intervals were then calculated using a random effects model.
resultsA total of 104 studies involving 20,152 cases were included. The proportion of asymptomatic individuals among those with COVID-19 was 13.34% (10.86%-16.29%), among which presymptomatic and covert infections accounted for 7.64% (4.02%-14.04%) and 8.44% (5.12%-13.62%), respectively. The proportions of asymptomatic infections among infected children and healthcare workers were 32.24% (23.08%-42.13%) and 36.96% (18.51%-60.21%), respectively. The proportion of asymptomatic infections was significantly higher after 2020/02/29 than before (33.53% vs 10.19%) and in non-Asian regions than in Asia (28.76% vs 11.54%). The median viral shedding duration of asymptomatic infections was 14.14 days (11.25-17.04). A total of 47.62% (31.13%-72.87%) of asymptomatic infections showed lung abnormalities, especially ground-glass opacity (41.11% 19.7%-85.79%).
conclusionsAsymptomatic infections were more commonly found in infected children and healthcare workers and increased after 2020/02/29 and in non-Asian regions. Chest radiographical imaging could be conducive to the early identification of asymptomatic infections.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.