ArticlePloS one2012
Etiology and clinical characteristics of influenza-like illness (ILI) in outpatients in Beijing, June 2010 to May 2011.
Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.
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Who cites it
27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 43 citations in OpenAlex.
- Regional-based within-year seasonal variations in influenza-related health outcomes across mainland China: a systematic review and spatio-temporal analysis.BMC medicine · 2022Pooled it
- Hospital utilization rates for influenza and RSV: a novel approach and critical assessment.Population health metrics · 2021Pooled it
- Trial
- The pathogen spectrum of influenza-like illness in Guilin, China, 2023-2024.Frontiers in public health · 2026Article
- Increased Risk of Influenza-Like Illness Clusters in Schools, Taiwan from 2011 to 2020: A Retrospective Study.Journal of epidemiology and global health · 2025Article
- Spatiotemporal patterns of influenza incidence changes in mainland China, 2004-2020.Frontiers in public health · 2025Article
- COVID-19 infection following influenza vaccine injection and its complications among nurses working in educational-medical hospitals of Ardabil in 2020.Journal of family medicine and primary care · 2023Article
- Etiology, clinical characteristics, and risk factors associated with severe influenza-like illnesses in Mexican adults.IJID regions · 2023Article
- Comparing variability in diagnosis of upper respiratory tract infections in patients using syndromic, next generation sequencing, and PCR-based methods.PLOS global public health · 2022Article
- Phylogenetic analysis and clinical characteristics of the co-occurring mutations in HA and NA genes of influenza A(H1N1)pdm09 viruses during 2015-2017 in Beijing, China.Virology journal · 2020Article
- Etiology and characteristics of community-acquired pneumonia in an influenza epidemic period.Comparative immunology, microbiology and infectious diseases · 2019Article
- Article
- Epidemiology of viral respiratory infections in Australian working-age adults (20-64 years): 2010-2013.Epidemiology and infection · 2018Article
- DETECTION OF NON-INFLUENZA VIRUSES IN ACUTE RESPIRATORY INFECTIONS IN CHILDREN UNDER FIVE-YEAR-OLD IN COTE D'IVOIRE (JANUARY - DECEMBER 2013).African journal of infectious diseases · 2018Article
- Burden and Seasonality of Viral Acute Respiratory Tract Infections among Outpatients in Southern Sri Lanka.The American journal of tropical medicine and hygiene · 2017Article
- Clinical Features of Influenza and Acute Respiratory Illness in Older Adults at Least 50 Years of Age in an Outpatient Setting in the Republic of Korea: a Prospective, Observational, Cohort Study.Journal of Korean medical science · 2017Observational
- Viral etiology of medically attended influenza-like illnesses in children less than five years old in Suzhou, China, 2011-2014.Journal of medical virology · 2016Article
- Etiology and Incidence of Viral Acute Respiratory Infections Among Refugees Aged 5 Years and Older in Hagadera Camp, Dadaab, Kenya.The American journal of tropical medicine and hygiene · 2015Article
- The clinical and etiological characteristics of influenza-like illness (ILI) in outpatients in Shanghai, China, 2011 to 2013.PloS one · 2015Article
- Is influenza-like illness a useful concept and an appropriate test of influenza vaccine effectiveness?Vaccine · 2014Review
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Authors and funding
9 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSince May 2009, exposure of the population of Beijing, China to pH1N1 has resulted in an increase in respiratory illnesses. Limited information is available on the etiology and clinical characteristics of the influenza-like illness (ILI) that ensued in adults following the pH1N1 pandemic.
methodsClinical and epidemiological data of ILI in adults was collected. A total of 279 throat swabs were tested for twelve respiratory viruses using multiplex RT-PCR. Clinical characteristics of influenza A in outpatients versus test-negative patients were compared using Pearson's χ2 and the Mann-Whitney U test. 190 swabs were tested for pH1N1 by virus isolation. Consultation rates for ILI were compared between 2009 and 2010.
resultsOne or two virus were detected in 29% of the samples. Influenza A virus (FLU-A) accounted for 22.9% (64/279). Other viruses were present at a frequency less than 3.0%. Cough was significantly associated with Influenza A virus infection (χ2, p<0.001). The positive rate of FLU-A was consistent with changes in the ILI rate during the same period and there was a significant reduction in the incidence of ILI in 2010 when compared to 2009. During the 2010-2011 influenza season, the incidence peaked in January 2011 in Beijing and north China.
conclusionsExposure to pH1N1 had no impact on typical influenza seasonal peaks, although FLU-A remained the predominant virus for 2010 in Beijing. Symptomatically, cough was associated with FLU-A infection. The positive rate of influenza virus was consistent with changes in the ILI rate during the same period and there was a significant reduction in the incidence of ILI in 2010 when compared to that of 2009.
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