ArticleVaccines2020
Characteristics of Seasonal Influenza Virus Activity in a Subtropical City in China, 2013-2019.
Article in Vaccines, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Epidemiological and virological characteristics of influenza in Zhejiang Province, China: A 15-year surveillance study.Human vaccines & immunotherapeutics · 2026Article
- Influenza virus infection during pregnancy: a review of risk factors, pathogenic mechanisms, and prevention strategies.Frontiers in immunology · 2026Review
- Impact of meteorological factors on influenza incidence in Wuxi from 2014 to 2019: a time series and comprehensive analysis.Frontiers in public health · 2025Article
- Epidemiological trends of influenza A and B in one hospital in Chengdu and national surveillance data (2019-2024).Frontiers in cellular and infection microbiology · 2025Article
- Spatiotemporal patterns of influenza incidence changes in mainland China, 2004-2020.Frontiers in public health · 2025Article
- Effectiveness of influenza vaccine among the population in Chongqing, China, 2018-2022: A test negative design-based evaluation.Human vaccines & immunotherapeutics · 2024Observational
- The 2Human vaccines & immunotherapeutics · 2024Article
- Epidemic patterns of the different influenza virus types and subtypes/lineages for 10 years in Chongqing, China, 2010-2019.Human vaccines & immunotherapeutics · 2024Article
- The Characteristics of the Influenza Virus Epidemic Around the SARS-CoV-2 Epidemic Period in the Pudong New Area of Shanghai.Journal of epidemiology and global health · 2024Article
- Spatial timing of circulating seasonal influenza A and B viruses in China from 2014 to 2018.Scientific reports · 2023Article
- Short-term impact of ambient temperature on the incidence of influenza in Wuhan, China.Environmental science and pollution research international · 2022Article
- Development and Effects of Influenza Antiviral Drugs.Molecules (Basel, Switzerland) · 2021Review
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10 authors.
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Abstract
backgroundTo optimize seasonal influenza vaccination programs in regions with potentially complicated seasonal patterns, the epidemiological characteristics of seasonal influenza activity in a subtropical city of China were explored. MATERIALS AND
methodsInfluenza virus data of patients with influenza-like illness (ILI) during 2013-2019 were collected from two sentinel hospitals in a subtropical region of China, Yichang city. The influenza virus positive rate among sampled ILI cases served as a proxy to estimate influenza seasonal characteristics, including periodicity, duration, peaks, and predominant subtypes/lineages. Epidemiological features of different years, seasons and age groups were analyzed, and vaccine mismatches were identified.
resultsIn total, 8693 ILI cases were included; 1439 (16.6%) were laboratory-confirmed influenza cases. The influenza A positive rate (10.6%) was higher than the influenza B positive rate (5.9%). There were three influenza circulation patterns in Yichang: (1) annual periodicity (in 2013-2014, 2015-2016 and 2018-2019), (2) semiannual periodicity (in 2014-2015), and (3) year-round periodicity (in 2016-2017 and 2017-2018). Summer epidemics existed in two of the six years and were dominated by influenza A/H3N2. Winter and spring epidemics occurred in five of the six years, and A/H1N1, A/H3N2, B/Victoria, and B/Yamagata were codominant. During the study period, the predominant lineages, B/Victoria in 2015-16 and B/Yamagata in 2017-2018, were both mismatched with the influenza B component of the trivalent vaccine. Children 5-14 years old (26.4%) and individuals over 60 years old (16.9%) had the highest influenza positive rates.
conclusionsThe seasonal epidemic period and the predominant subtype/lineage of influenza viruses in Yichang city are complex. Influenza vaccination timing and strategies need to be optimized according to the local features of influenza virus activity.
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