Nationally, influenza a h3n2 viruses were predominant overall for the season, with influenza b viruses becoming predominant from march onwards. Highly pathogenic avian influenza hpai viruses of the. National and regional summary of select surveillance components. Surveillance of influenza and other respiratory viruses in the united. Objectives understand a bit about the flu virus and how it spreads. Influenza, commonly called the flu, is an illness caused by rna viruses orthomyxoviridae family that infect the respiratory tract of many animals, birds, and humans. Most experts believe influenza viruses spread primarily by droplets made when infected people cough, sneeze, or talk. By week 462016, 28 countries had reported low influenza. Widespread noncommunicable diseases such as cardiovascular disease and cancer are not included.
Influenza vaccine uptake in 2015 to 2016 in england was lower than last. In new england, the yearly flu season usually begins in. Were infections with novel nonhuman influenza viruses detected during 20152016. Christie alexander, president of the florida academy of family physicians, stresses that. Outbreak h5n2 viruses from 2015 show increased adaptation to chickens. There are several flu vaccine options available for the 2016 2017 flu season including a new vaccine for people 65 years and older, fluad, and a quadrivalent flu shot licensed for people four years and older, flucelvax. A summary of the surveillance findings of these systems during. Count of deaths reported to wa doh by county of residence table 3 shows the count of laboratoryconfirmed influenza deaths reported to the washington state department of. Influenza a virus in swine iavs type a influenza viruses can infect swine and cause a respiratory disease called influenza a virus in swine iavs.
The influenza a and b viruses that routinely spread in people human influenza viruses are responsible for seasonal flu epidemics each year. In comparison, na genomic diversity remained relatively stable. Influenza a viruses can be broken down into subtypes depending on the genes that make up the surface proteins. Understand which new flu viruses are circulating in south carolina. Flu is an illness caused by influenza viruses that infect the respiratory tract. An influenza pandemic is a global outbreak of a new influenza a virus that is very different from current and recently circulating human seasonal influenza a viruses. These elevated measures may be associated with the much higher percent of subtyped influenza a viruses identified as type a h3n2 influenza viruses during the 201617 flu season as. Influenza viruses that infect humans can be classified into three main groups. Influenza vaccine uptake in 2016 to 2017 in england was higher than the. Some basics about flu and colds each year, americans get more than 1 billion colds, and between 5 and 20 percent of americans get the flu. This type contains an inactivated vaccine, made up of killed viruses.
Find a flu clinic near you at the flu vaccine locator. A map of counties with recent influenza positive specimens is included. The latest report and archived data are available here, along with other influenza surveillance data. Quercetin as an antiviral agent inhibits influenza a virus. Vaccine uptake was monitored through manual returns by local. Respiratory viruses influenza dr andrew lee, consultant in communicable disease control public health england andrew. Cdcs adjusted overall ve estimate against influenza a and b viruses for all ages was 47%. The 20182019 flu vaccine was 29 percent effective against influenza a and b and 44 percent effective in preventing influenza a h1n1 viruses in the united states. Highly pathogenic h5 avian influenza in 2016 and 2017 food and.
California influenza surveillance program highlights week 50. There are several flu vaccine options available for the 20162017 flu season including a new vaccine for people 65 years and older, fluad, and a quadrivalent flu shot licensed for people four years and older, flucelvax. Dating the emergence of pandemic influenza a viruses. The two diseases have some symptoms in common, and both are caused by viruses. The highly pathogenic h5n2 avian flu virus strain that caused outbreaks in poultry flocks across the united states is better adapted to chickens than a precursor h5n2 virus and is highly adapted to wild ducks, according to a new study by us department of agriculture usda scientists published in virology. Annual report surveillance of influenza and other respiratory.
Surveillance of influenza and other respiratory viruses in the uk. During the influenza season, the oregon public health division publishes a weekly surveillance report, flu bites. Influenza a viruses are the only influenza viruses known to cause flu pandemics, i. Our analysis of viruses from domestic ducks at tanguar haor, bangladesh, showed genetic similarities with other viruses from wild birds in central asia, suggesting their potential role in the genesis of ah5n8. Data at a glance march 29april 4, 2020 week 14 current week 14 previous week percentage of emergency department visits for ili1 3. Influenza the flu is an infection of the nose, throat and lungs caused by influenza viruses that are constantly changing.
People may be able to spread the virus to others about one day before. In washington state, influenza a h3n2 and a h1n1, as well as influenza b viruses, were seen throughout the season. Background influenza, or flu, is a respiratory infection caused by a variety of influenza viruses. It is recommended that quadrivalent vaccines containing two influenza b viruses contain the above three viruses and a bbrisbane602008like virus.
Surveillance of influenza and other respiratory viruses in the united kingdom. Even unrelated viruses can be recognized by the same crossreactive t cells. In 2016, highly pathogenic avian influenza ah5n1 virus caused continued outbreaks and was. We performed phylogenetic analysis on 39 fullgenome h5n1 virus samples collected during outbreaks among poultry in 20152016 in west java and compared them with recently published.
Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Influenza and other respiratory viruses weekly report. Influenza flu can cause mild to severe illness, and at times can lead to death. How much flu vaccine was produced and distributed during the 20152016 season. Influenza also known as the flu is a contagious viral infection that attacks your respiratory system. A flu vaccine is made to protect against the flu viruses that research and surveillance indicate will likely be most common during the season. The new york state department of health nysdoh collects, compiles, and analyzes information on flu activity yearround in new york state nys, and produces a weekly report during the flu season october through the following may. Winter 2015 to 2016 4 executive summary moderate levels of influenza activity were seen in the community in the uk in 2015 to 2016, with influenza ah1n1pdm09 the predominant circulating virus for the majority of the season. Human cases of avian influenza ah5 reported in 25 february4 april 2016. What flu viruses circulated during the 20152016 season. Surveillance of influenza and other respiratory viruses in. Flu is spread from close contact with persons who are sick with flu or from touching surfaces or objects that have flu virus on them. Influenza at the humananimal interface world health organization.
Getting the seasonal influenza vaccine is the most important step in preventing flu viruses. The flu shot is approved for use in people older than 6 months, including healthy people, pregnant women and people with chronic medical conditions. The flu vaccine does not include any of the coronaviruses, a family of viruses that includes some that may give people upper respiratory illnesses. Seasonal influenza activity, january 2016 august 2016. Surveillance of influenza and other respiratory infections in. These symptoms typically begin two days after exposure to the virus and most last less than a week. Understand difference between pandemics and seasonal flu. Over the course of flu season, cdc studies samples of circulating flu viruses to evaluate how close a match there is between viruses used to make the flu vaccine and circulating flu viruses. A pandemic can occur when a new and very different influenza a virus emerges that both infects people and has the ability to spread efficiently between people. However, in light of low effectiveness against influenza.
People who have flu often feel some or all of these symptoms. Since the previous update, new human infections with influenza ah5n6, ah7n9, ah1n2v and ah3n2v viruses were reported. In most people, the infection results in the person getting a fever, cough, headache, and malaise tired, no energy. These include all the human influenza pandemics such as the 1918 spanish flu. Influenza activity, surveillance and reports new york. Influenza a viruses iavs cause seasonal pandemics and epidemics with high morbidity and mortality, which calls for effective antiiav agents. Flu is a disease of the bodys breathing system, including the nose, throat and lungs. Most of the people who were hospitalized and the person who died had one or more health or age factor that put them at high risk of serious flurelated complications. Recommended composition of influenza virus vaccines for use in the 20152016 influenza season full report pdf, 81kb. The illness can be mild to severe and can cause death in some people. However, they are different conditions, and the flu is more severe.
Everything you need to know about the flu illness, including symptoms, treatment and prevention. A guide for parents flu information what is the flu. Infection can occur when flu viruses contact the eyes, mouth, or nose, and through breathing in droplets from a sneeze or cough. Who recommended composition of influenza virus vaccines. Flu reports california department of public health. The evolution and genetic diversity of avian influenza a. Recommendations for vaccine viruses to be included in. The glycoprotein hemagglutinin of influenza virus plays a crucial role in the initial stage of virus infection, making it a potential target for antiinfluenza therapeutics development. All human infections caused by a new influenza subtype are reportable. Flu causes illness, hospital stays and deaths in the united states each year.
Risk assessment of seasonal influenza, eueea, 20162017 ecdc. Circulating flu viruses match vaccine cdcslaboratory data so far show that most circulating flu viruses are still like the viruses recommended for the 2015. 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. With most of the flu season still to come, getting a flu vaccine now. During the 20162017 winter season, the influenza epidemic in the. Ah1n1pdm09 in the united states during the 2014 and 201516 seasons, acip june, 2016 made. Recommended composition of influenza virus vaccines for use in. This season, influenza viruses, mainly ah3n2, began circulating early in the eueea. This article is a list of deaths caused by an infectious disease. It is injected into the muscle with a needle in the upper arm or upper thigh. Influenza is present at low levels in pigs throughout the world and regularly causes disease outbreaks.
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