The Seattle Flu Study: a multiarm community-based ... On the epidemiology of influenza | Virology Journal | Full ... There are two main types of flu viruses: Type A and B. Epidemiology of the Influenza Virus. Influenza virus activity in the community results in significant mortality, morbidity and economic disruption, particularly in those at high risk of developing complications, such as the elderly and those with underlying ch …. Use of national pneumonia surveillance to describe influenza A(H7N9) virus epidemiology, China, 2004-2013. Background There are few data on the comparative epidemiology and virology of the pandemic 2009 influenza A (H1N1) virus and cocirculating seasonal … Influenza - Infectious Diseases - Merck Manuals ... Influenza is usually self limiting in healthy individuals, with recovery in 3-7 days. Emerg Infect Dis … Influenza viruses - Virology Journal sore throat. Full-length genome sequences of the first H9N2 avian ... Color By. Although the word "epidemic" sounds scary, it isn't uncommon for the Pandemic influenza A (H1N1) virus emerged in Mexico in early 2009 and rapidly spread worldwide. Seasonal influenza vaccination in adults - UpToDate Xiang N, Havers F, Chen T, et al. Emerg Med J. This may include inferred dates for ancestral nodes in the tree, and thus the date range here can be wider than the sample collection range. Highly pathogenic avian influenza (HPAI) H5N1 virus strains have infected poultry or wild birds in more than 50 countries since 2003. Steinhoff MC. Su S, Fry AM, Kirley PD, et al. Since the late 1970s, influenza A(H1N1) and influenza A(H3N2) have been the common influenza A viral subtypes circulating among humans . There have been six major influenza epidemics in the last 140 years, with the 1918 flu pandemic being the most severe; this is estimated to have been responsible for the deaths of 50–100 million people. influenza The diagnosis was based on r … Volume 20, Number 7—July 2014 Epidemiology of Influenza Virus Types and Subtypes in South Africa, 2009–2012 Adam L. Cohen et al. An influenza pandemic is an epidemic of an influenza virus that spreads across a large region (either multiple continents or worldwide) and infects a large proportion of the population. Background: Despite thousands of influenza cases annually recorded by surveillance systems around the globe, estimating the transmission patterns of seasonal influenza is challenging. Influenza is an acute respiratory illness, caused by influenza A, B, and C viruses, that occurs in local outbreaks or seasonal epidemics. 2011;28(11):924‐926. The epidemiology of influenza swarms with incongruities, incongruities exhaustively detailed by the late British epidemiologist, Edgar Hope-Simpson. Influenza is a serious public health threat throughout the world. CAS Article PubMed Google Scholar 4. Influenza is a viral respiratory infection Overview of Viral Respiratory Infections Viral infections commonly affect the upper or lower respiratory tract. Annu Rev Med. A wide spectrum of influenza viruses causes it. 2000;51:407–21. Background: H9N2 avian influenza viruses (AIV) has a worldwide geographic distribution and affects poultry of different types of production. Lancet Infect Dis. 2016;63(6):602–20. Major genetic changes in the influenza A virus (antigenic shift) occurs at irregular intervals, resulting in the emergence of new sub-types, that may lead to widespread epidemics or a pandemic in populations who have little or no immunity 2. An effective response to a potential pandemic requires the infrastructure to rapidly detect, characterise, and potentially contain new and emerging influenza strains at both an individual and population level. Epidemiology of avian influenza A H7N9 virus in human beings across five epidemics in mainland China, 2013-17: an epidemiological study of laboratory-confirmed case series. In the United States alone, seasonal influenza contributes to about 30 000 excess deaths per year on average [Reference Thompson 1], and accounts for millions of lost work days each year [Reference Fiore 2].Controlling influenza is a multifaceted effort but seasonal influenza vaccination has been the … Epidemiology Influenza A and B Type A viruses are responsible for the highest burden of disease during seasonal epidemics, although both influenza A and B types are able to cause epidemics, significant disease and deaths. A systematic review of the comparative epidemiology of avian and human influenza A H5N1 and H7N9 - lessons and unanswered questions. the most common presentation of influenza and is characterized by the abrupt onset of signs and symptoms that include fever, muscle aches, headache, malaise, nonproductive cough, sore throat, vomiting, and rhinitis. In November 2016, HPAI H5N8 was detected in a commercial layer farm in Tehran province. The epidemiology of influenza. Recent discoveries indicate vitamin D … Influenza - StatPearls - NCBI Bookshelf. The role of influenza vaccination in the prevention of seasonal influenza will be reviewed here. Transbound Emerg Dis. Nosocomial transmission has been reported despite infection control measures. Influenza can be difficult to diagnose, because its most visible symptoms (fever, cough, aches) are similar to many other common illnesses. Epidemiology In the northern hemisphere influenza occurs during the winter months (December - March). In the nomenclature of influenza A viruses, these different HA and NA proteins are represented by the letters “H” and “N”, respectively. The complexities and challenges for healthcare providers and their efforts to provide fundamental basic items to meet the logistical demands of an influenza pandemic are discussed in this article. cough. Influenza B viruses are separated into two distinct genetic lineages (Yamagata and Victoria) on the basis of … Background. H9N2 AIV was first reported in the Northeast of Algeria in April 2017, following an outbreak associated with high mortality, in broiler flocks. auspice. Influenza is a communicable viral disease that affects the upper and lower respiratory tract. The central focus of this paper is to investigate the methodology of disease transmission for the influenza virus. In 2010, H5N8 highly pathogenic avian influenza (HPAI) viruses of the A/Goose/Guangdong/1/1996 lineage dramatically affected poultry and wild birds in Asia, Europe, and North America. Influenza is an acute viral infection of the respiratory tract that spreads easily from person to person. transmitted among humans in three main ways: by direct contact with infected individuals, through contaminated objects (such as hairbrushes or towels – often called fomites) and by inhaling virus-laden aerosols. It is a contagious respiratory illness caused by influenza viruses. Use this slider to filter the data based on the sample date. Date Range. The H3N2 subtype has been associated with unprecedented high levels of intensive care unit (ICU) admission. Azziz-Baumgartner E, Alamgir ASM, Rahman M, Homaira N, Sohel BM, Sharker MAY, Zaman RU, Dee J, Gurley ES, Mamun AA, Mah-e-Muneer S, Fry AM, Widdowson, MA, Bresee J, Lindstrom S, Luby S. Incidence of influenza-like illness and The mortality rate following influenza infections in HSCT recipients was previously reported to be around 15% 18, 19, although recent data reporting outcome after more widespread utilization of neuramidase inhibitors suggest a somewhat lower risk for fatal outcome 20, 21.The recent outbreak of new pandemic strain A/H1N1 stressed the importance of having … 5, 6 The incubation period is 1 to 2 days. Influenza virus has a rounded shape (although it can be elongated or irregularly shaped) and has a layer of spikes on the outside. Annual seasonal influenza epidemics result in 290,000-650,000 deaths worldwide, while influenza pandemics have resulted in many more - the A(H1N1) pandemic of 1918-1919 caused 20-50 million deaths. Epidemiology. The GIHSN provides an opportunity to analyse influenza epidemiology and vaccine effectiveness worldwide. Elderly people, children under 6 months old, pregnant women, and people with chronic conditions or immunosuppression are at increased risk of complications. INTRODUCTION. Viral infections presenting concurrently with bacterial pneumonia are now known to occur with a frequency of 30–50% in both adult and pediatric populations. Help Protect Against Multiple Strains. Influenza is associated with a high predisposition to bacterial sepsis and ARDS. Influenza is an acute respiratory infection caused by a negative-strand RNA virus of the Orthomyxoviridae family. In the 2016/17 season, A(H3N2) was the predominant influenza strain this season (first wave), followed by B/Victoria (second wave). These symptoms begin from one to four days after exposure to the virus (typically two days) and last for about 2–8 days. Healthcare systems struggle to effectively manage the constant threat because of the evolving nature of the virus. Influenza A(H1N1)pdm09 was mainly found in Mexico. joints. Background: Influenza causes lower respiratory tract complications (LRTCs), particularly bronchitis and pneumonia, in both otherwise healthy adults and those with underlying conditions. Seasonal influenza is a vaccine-preventable disease that each year infects approximately ten to thirty per cent of Europe's population, and causes hundreds of thousands of hospitalisations across Europe. Epidemiology and prevention of influenza. Seasonal influenza. The supply chain, planning, and alternatives for inevitable … Wang X, Jiang H, Wu P, et al. Clinical illness follows a short incubation period and presentation ranges from asymptomatic to fulminant, depending on the characteristics of both the virus and the individual host. View Article PubMed/NCBI Google Scholar 32. The symptoms can appear very quickly and include: headache. Influenza, commonly known as "the flu", is an infectious disease caused by influenza viruses.Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. Sixteen countries have reported detection of cases of human HPAI H5N1 virus infection since 2003. 2014;201(2):109–11. aching muscles. Although respiratory infections can be classified by the causative virus (eg, influenza), they are generally classified... read more causing fever, coryza, cough, headache, and malaise. Annual influenza vaccination is an important public health measure for preventing influenza infection . 7, 8 The aim of this study was to assess the effect of oseltamivir treatment on the incidence of LRTCs leading to antibiotic treatment and hospitalizations following influenza illness. Each type includes many different strains that tend to change from year to year. The need to ICU admission in the influenza-positive vaccine group was 16.9%, and in the influenza- negative vaccine group was 11.5% (p=0.235), and the length of ICU admission for the influenza-positive vaccine group was 1.17±3.09 days, and for the influenza negative vaccine group was 0.92±3.04 days (p=0.809). GISAID - influenza genomic epidemiology. 2017 Aug;17(8):822-32. http://www.ncbi.nlm.nih.gov/pubmed/28583578?tool=bestpractice.com Influenza Other enza A (H1N1) 2009 outbreak. Healthcare providers have several different ways to determine if a patient has the flu. Between 2003 and 2018, 860 cases were reported, with 454 deaths (a case fatality rate of 53%). Influenza remains a globally important cause of febrile respiratory illness. Survey of influenza and other respiratory rapid influenza diagnostic test in children and clinical utility during influ- viruses diagnostic testing in US hospitals, 2012‐2013. Flu can cause mild to severe illness, and at times can lead to death. fever. Objective To record clinical findings in all new cases of Guillain–Barré syndrome … The Global Influenza Programme (GIP) provides Member States with strategic guidance, technical support and coordination of activities essential to make their health systems better prepared against seasonal, zoonotic and pandemic influenza threats to populations and individuals. Influenza vaccine effectiveness in Australia: results from theAustralian Sentinel Practices Research Network. Latest Activity; Mark Channels Read; Calendar; Forum; Welcome to the SCIENTIFIC LIBRARY: COVID-19, SARS-CoV-2; Other scientific studies including seasonal & novel flu Cox NJ, Subbarao K. Global epidemiology of influenza: past and present. a highly contagious airborne disease that occurs in seasonal epidemics and manifests as an acute febrile illness with variable degrees of systemic symptoms. Scribd is the world's largest social reading and publishing site. There are two different kinds of spikes, each made of a different protein – one is the hemagglutinin (HA) protein and the other is the neuraminidase (NA) protein.. The influenza virus, colloquially referred to as the flu, is a standout amongst the most well-known infectious processes in individuals of all ages and demographics. Clinical and virological impact of single and dual infections with influenza A (H1N1) and SARS-CoV-2 in adult inpatients. Influenza activity in the United States during the 2021 to 2022 influenza season is difficult to predict, and activity may vary depending on location and the measures taken by individual communities to mitigate the spread of SARS-CoV-2.1 Influenza activity worldwide has been very low since the early spring of 2020, including in the United States during the 2020 to 20 Type A influenza is a contagious viral infection that can have life-threatening complications if left untreated. The protection provided by influenza vaccines is based upon induction of virus-neutralizing antibodies, mainly against the viral hemagglutinin. The complex evolution of RSV creates a need for worldwide surveillance, which may assist in the understanding of multiple viral aspects. According to the Centers for Disease Control and Prevention (CDC) (2016), the virus commonly known as influenza or “the flu” is 2021-12-17. Severity of illness now appears to be more moderate than initially feared [ 1, 2 ], although high population attack rates would be associated with significant numbers of severe infections, hospitalizations and deaths. influenza.docx - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Personal protective equipment (PPE) is a primary strategy to protect health care personnel (HCP) from infectious diseases. In the Northern Hemisphere, the influenza season typically starts in early fall, peaks in … Joshua L. Rein et al. Influenza Vaccine 2022 - Recommended By The CDC. 2012-10-22. DOCS HELP. Visit The HCP Site To Learn About A Flu Vaccine Recommended By The CDC. pmid:25045991 . Influenza virus is transmitted from person to person via the respiratory route when small-particle aerosols are generated by infected humans through coughing, sneezing, or speaking. Med J Aust. When transmission-based PPE ensembles are not appropriate, HCP must recognize the transmission pathway of the disease and anticipate the exposures to select PPE. Background Respiratory Syncytial Virus (RSV) is the main cause of pediatric morbidity and mortality. The Influenza viruses section of Virology Journal will publish articles on all aspects of influenza virus research, including molecular genetics, molecular biology, biochemistry, biophysics, structural biology, cell biology, immunology, morphology, and pathogenesis. Influenza . Influenza (flu) is a viral infection affecting the lungs and airways. Some of these viruses can infect humans, and some are specific to different species. He was the first to propose a parsimonious theory explaining why influenza is, as Gregg said, "seemingly unmindful of traditional infectious disease behavioral patterns." Order Now. Volume 20, Number 7—July 2014 Novel Reassortant Influenza A(H5N8) Viruses, South Korea, 2014 Objectives This study aimed to investigate RSV features under the Brazilian Influenza Surveillance Program, evaluating the role … The outcome for childhood GBS and FS after 6 months was better than reported in adults, and when considering the children living in England, there was no significantly increased risk of GBS after pandemic A/H1N1 2009 influenza vaccination or 2010/2011 seasonal influenza vaccination. Introduction Influenza epidemics and pandemics cause significant morbidity and mortality. Influenza is commonly referred to as “the flu.”. 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