Seroprevalence of H7N9 infection among humans: A systematic review and meta-analysis. 2020

Qiang Wang, and Ke Xu, and Weihua Xie, and Liuqing Yang, and Haiyan Chen, and Naiyang Shi, and Changjun Bao, and Haodi Huang, and Xuefeng Zhang, and Yilan Liao, and Hui Jin
Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, China.

In spring 2013, a novel avian-origin influenza A (H7N9) virus emerged in mainland China. The burden of H7N9 infection was estimated based on systematic review and meta-analysis. The systematic search for available literature was conducted using Chinese and English databases. We calculated the pooled seroprevalence of H7N9 infection and its 95% confidence interval by using Freeman-Tukey double arcsine transformation. Out of 16 890 records found using Chinese and English databases, 54 articles were included in the meta-analysis. These included studies of a total of 64 107 individuals. The pooled seroprevalence of H7N9 infection among humans was 0.122% (95% CI: 0.023, 0.275). In high-risk populations, the highest pooled seroprevalence was observed among close contacts (1.075%, 95% CI: 0.000, 4.357). The seroprevalence among general population was (0.077%, 95% CI: 0.011, 0.180). Our study discovered that asymptomatic infection of H7N9 virus did occur, even if the seroprevalence among humans was low.

UI MeSH Term Description Entries
D007251 Influenza, Human An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia. Grippe,Human Flu,Human Influenza,Influenza in Humans,Influenza,Flu, Human,Human Influenzas,Influenza in Human,Influenzas,Influenzas, Human
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D002681 China A country spanning from central Asia to the Pacific Ocean. Inner Mongolia,Manchuria,People's Republic of China,Sinkiang,Mainland China
D005585 Influenza in Birds Infection of domestic and wild fowl and other BIRDS with INFLUENZA A VIRUS. Avian influenza usually does not sicken birds, but can be highly pathogenic and fatal in domestic POULTRY. Avian Flu,Avian Influenza,Fowl Plague,Influenza, Avian,Avian Influenzas,Flu, Avian,Influenza in Bird,Influenzas, Avian,Plague, Fowl
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012307 Risk Factors An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent. Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D012621 Seasons Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D015047 Zoonoses Diseases of non-human animals that may be transmitted to HUMANS or may be transmitted from humans to non-human animals. Zoonotic Spillover,Zoonotic Diseases,Zoonotic Infections,Zoonotic Infectious Diseases,Disease, Zoonotic,Disease, Zoonotic Infectious,Diseases, Zoonotic,Diseases, Zoonotic Infectious,Infection, Zoonotic,Infections, Zoonotic,Infectious Disease, Zoonotic,Infectious Diseases, Zoonotic,Spillovers, Zoonotic,Zoonotic Disease,Zoonotic Infection,Zoonotic Infectious Disease,Zoonotic Spillovers
D016036 Seroepidemiologic Studies EPIDEMIOLOGIC STUDIES based on the detection through serological testing of characteristic change in the serum level of specific ANTIBODIES. Latent subclinical infections and carrier states can thus be detected in addition to clinically overt cases. Seroprevalence,Seroepidemiologic Study,Seroepidemiological Study,Studies, Seroepidemiologic,Study, Seroepidemiologic,Seroepidemiological Studies,Seroprevalences,Studies, Seroepidemiological,Study, Seroepidemiological

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