In addition, the 2018–2019 season had two waves of activity, including a wave predominated by influenza A(H1N1)pdm09 viruses and another wave of similar magnitude attributable to influenza A(H3N2) viruses5. More than 52,000 hospitalizations occurred in children aged < 18 years and 86,000 hospitalizations among adults aged 18-49 years. We estimate that at least 434 deaths associated with influenza occurred during the 2019-2020 season among children aged <18 years. Our estimates of hospitalizations and mortality associated with the 2018–2019 influenza season continue to demonstrate how serious influenza virus infection can be. However, death certificate data during the 2018–2019 season were not available at the time of estimation. During the 2017–2018 season, influenza activity started in week 49/2018, peaked in week 7/2019 and returned to baseline levels in week 17/2019. 2019 to 2020 – 33%; 2018 to 2019 – 31%; 2017 to 2018 – 29%; 2016 to 2017 – 27%; 2015 to 2016 – 27%; 2014 to 2015 – 30%; 2013 to 2014 – 27.6%; 2012 to 2013 – 23%; 2011 to 2012 – 22.5%; 2010 to 2011 – 22% ; Health care worker immunization. CDC twenty four seven. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. This web page provides estimates on the burden of influenza (flu) in the United States for the 2019–2020 flu season. The shaded area indicates weeks where the positivity rate was at least 5% and a minimum of 15 positive tests were observed, signalling the period of seasonal influenza activity. This report summarizes the 2018-2019 influenza season in the temperate regions of the northern hemisphere. Comparing COVID-19 and 2020 influenza and pneumonia mortality rates, the largest absolute difference in rates was found in those aged 85 years and over, with a difference of 712.9 deaths per 100,000 people. Influenza deaths in 2019 and 2020 . In addition to expected changes in available data on testing practices and patients hospitalized for flu, there were unexpected data delays due to the onset of the COVID-19 pandemic in Spring 2020. Mortality for COVID-19 appears higher than for influenza, especially seasonal influenza. Read the review in the Weekly epidemiological record; Archives. Although a great deal of attention has been given to the coronavirus disease 2019 (COVID-19) epidemic, it is most severe in one area of China and appears to have limited clinical ramifications outside of that region. Human mortality from H5N1 or the human fatality ratio from H5N1 or the case-fatality rate of H5N1 refer to the ratio of the number of confirmed human deaths resulting from confirmed cases of transmission and infection of H5N1 to the number of those confirmed cases. In the Lancet Public Health, the population-based modelling study by Li Li and colleagues1 on influenza-associated excess respiratory mortality in mainland China contributes an essential piece to the global picture of influenza-associated mortality. In 1920, the mortality rate among people under 65 had decreased sixfold to half the mortality rate of people over 65, but 92% of deaths still occurred in people under 65. For the past several years, CDC has estimated the numbers of influenza illnesses, medical visits, hospitalizations, and deaths1–4. Symptoms. This also underscores that influenza viruses can affect individuals of any age and prevention measures such as vaccination are important to reducing the impact of the seasonal epidemics on the population and healthcare system. Third, estimates of influenza-associated illness and medical visits are based on a ratio of illnesses to hospitalizations determined in a prior study. Select format (Excel or CSV for example) This will provide you with a dataset showing the number of deaths from influenza in 2019. Select rates - All deaths, rates or percentage of population for example. Furthermore, our model uses the frequency of influenza-related deaths that have cause of death related to pneumonia or influenza (P&I), other respiratory or cardiovascular (other R&C), or other non-respiratory, non-cardiovascular (non-R&C) to account for deaths occurring outside of a hospital by cause of death. View the retrospective 2017 to 2018 data. The method used to estimate flu-related deaths relies on additional data from FluSurv-NET and the National Center for Health Statistics (NCHS) (data on cause of death and numbers of deaths that occur inside versus outside of the hospital). The most updated crude rates of hospitalization for FluSurv-NET sites from the 2018–2019 season are available on FluView Interactive7. The number of influenza-associated illnesses that occurred last season was similar to the estimated number of influenza-associated illnesses during the 2012–2013 influenza season when an estimated 34 million people had symptomatic influenza illness6. Review of the 2018-2019 influenza season in the northern hemisphere. By combining data on hospitalization rates, influenza testing practices, and the frequency of death in and out of the hospital from death certificates, we estimate that there were approximately 480 deaths associated with influenza in children during 2018–2019. leading cause and influenza and pneumonia, the ninth in 2019, switched ranks. CDC estimates the influenza illnesses, hospitalizations, and deaths prevented by seasonal influenza vaccination. A nurse wears a cloth mask while treating a patient in Washington, DC . A CFR is the proportion of people diagnosed with a disease who die from the disease (cf. GP consultation rates for influenza-like illness (ILI) remain low in all schemes in the UK (Table 1 & Figure 1). Influenza viruses circulated at high levels between weeks 52/2018 and 12/2019. adopted a similar step-wise method to extrapolate influenza-associated respiratory excess mortality rates for provinces in mainland China without valid data for a direct estimation. Compared with the 2017–2018 season , which was classified as high severity, the overall rates and burden of influenza were much lower during the 2018–2019 season (Table 2). No influenza-related excess mortality was seen among people 65 years and older, although a small peak in all-cause excess mortality was seen in week 1, 2019, in northern Sweden. The additional mortality data from FluSurv-NET are typically not available for up to 2 years after the end of a flu season. These rates mean that an estimated 15 million cases of influenza in younger adults (aged 18-49 years), which is the highest number of infections for this age group since CDC began reporting influenza burden estimates in the 2010-11 season. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. The highest age-specific mortality rate was observed in those aged 85 years and over, with 1,744.3 deaths per 100,000 people. Saving Lives, Protecting People, Benefits of Flu Vaccination for the 2018-2019 Season, https://www.cdc.gov/flu/about/burden/past–seasons.html, https://www.cdc.gov/flu/about/classifies-flu-severity.htm, https://www.cdc.gov/flu/weekly/fluviewinteractive.htm, https://www.cdc.gov/flu/fluvaxview/coverage–1819estimates.htm, Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD), Reconstruction of the 1918 Influenza Pandemic Virus, 2019-2020 Preliminary In-Season Burden Estimate, Who is at High Risk for Flu Complications, Who Should & Who Should NOT Get Vaccinated, Live Attenuated Influenza Vaccine (LAIV)/Nasal Spray Vaccine, Selecting Viruses for the Seasonal Influenza Vaccine, Flu Vaccine and People with Egg Allergies, Frequently Asked Questions on Vaccine Supply, Historical Reference of Vaccine Doses Distributed, Hospitalized Adult Influenza Vaccine Effectiveness Network (HAIVEN), How Vaccine Effectiveness and Efficacy are Measured, What People with a Staph Infection Should Know about Flu, Resources for Hosting a Vaccination Clinic, Overview of Influenza Surveillance in the United States, Influenza Hospitalization Surveillance Network (FluSurv-NET), Weekly U.S. 4) per 100 000 person-seasons for influenza A(H1N1)pdm09, A(H3N2), and B viruses, respectively (appendix pp 21–22). Freedom of Information | Released on 8 September 2020 Influenza deaths in 2018, 2019 and 2020 . However, data on testing practices during the 2019-2020 season are not available in real-time. Flu: Caused by any of several different types and strains of influenza viruses.Different strains circulate each year. CDC estimates the influenza illnesses, hospitalizations, and deaths prevented by seasonal influenza vaccination. The number of cases of influenza-associated illness, medically attended illnesses, hospitalizations, and deaths were lower than some more recent seasons and similar to other seasons where influenza A(H1N1)pdm09 viruses dominated (7, 8). However, data on testing practices during the 2019–2020 season were not available at the time of estimation. 50 30 40 Syndromic surveillance o Syndromic surveillance indicators for influenza remained low, in weeks 37 and 38 2019. o For further information, please see the Syndromic surveillance webpage. Second, national rates of influenza-associated hospitalizations and in-hospital death were adjusted for the frequency of influenza testing and the sensitivity of influenza diagnostic assays, using a multiplier approach (3). Every year we encourage more Albertans to get immunized. CDC’s estimates of hospitalizations and mortality associated with the 2019–2020 influenza season show the effects that influenza virus infections can have on society. In contrast, Japan and Taiwan had reported a mortality rate from influenza around 0.45% and 0.69% respectively, higher than the mortality rate collected from data in Chinese port cities, such as Hong Kong (0.25%), Canton (0.32%), and Shanghai. Freedom of Information | Released on 14 April 2020 Influenza deaths from 1999 to 2021 . Age-specific death rates decreased from 2018 to 2019 . The burden of influenza and the rates of influenza-associated hospitalization are usually higher for the very young and the very old, and while this was observed during the 2019–2020 season, rates of hospitalization in adults aged 18-49 years were the highest seasonal rates seen since the 2017-2018 season (Table 2). CDC uses the estimates of the burden of flu in the population to inform policy and communications related to influenza prevention and control. However children less than 5 years old also reported a relevant influenza attributable excess death rate in the 2014/15 and 2016/17 seasons (1.05/100,000 and 1.54/100,000 respectively). At the national level, notifications of laboratory-confirmed inf… However, data from FluSurv-NET that is usually available at the end of flu season was delayed in 2020 due to the onset of the COVID-19 pandemic. The vast majority of influenza viruses detected were type A. CDC uses the estimates of the burden of influenza in the population to inform policy and communications related to influenza. Unlike adult flu-related deaths, pediatric flu-related deaths are reportable in the United States. These estimates are subject to several limitations. Burden estimates from the 2018–2019 season will be updated at a later date when data on contemporary testing practices become available. This is unusual since influenza is typically most deadly to weak individuals, such as infants under age two, adults over age 70, and the immunocompromised . Figure 2 – Number of positive influenza tests and percentage of positive tests, by type, subtype and report week, Canada, weeks 2018-35 to 2019-34. The current estimates were made using the highest testing rate for each age-group from the 2010-2011 through the 2017-2018 seasons. The methods used to calculate the estimates have been described previously (1-2). Therefore, we used a mathematical model to estimate the total number of pediatric deaths based on hospitalization rates and the frequency of death in and out of the hospital using death certificates. 4 per 100 000 individuals). Alltagssprachlich wird die Bezeichnung Grippe häufig auch für grippale Infekte, Erkältung oder Verkühlung verwendet, bei denen es sich aber um verschiedene andere, in der Regel deutlich harmloser verlaufende (insof… US influenza statistics by flu season. These reports summarise the levels of influenza across the UK in previous winters. Based on NCHS mortality surveillance data available on April 1, 2021, 11.4% of the deaths that occurred during the week ending March 27, 2021 (week 12), were due to pneumonia, influenza, and/or COVID-19 (PIC). Please also see the following dataset: Deaths registered in England and Wales. Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world. Estimates of influenza-associated mortality were of similar magnitude. Deaths in children with laboratory-confirmed influenza virus infection have been a reportable disease in the United States since 2004; 188 deaths were reported for the 2019-20 season as of September 19, 2020. Due to the 2017 to 2018 data issues described in our 2018 to 2019 ILI technical document, the ILI data included on the weekly reports has been revised. 22,000 flu deaths, enough people to fill Madison Square Garden in New York City. COVID-19: How mortality rates in 2020 compare with past decades and centuries. Publications. Human mortality from H5N1 or the human fatality ratio from H5N1 or the case-fatality rate of H5N1 refer to the ratio of the number of confirmed human deaths resulting from confirmed cases of transmission and infection of H5N1 to the number of those confirmed cases. Fourth, our estimate of influenza-associated deaths relies on information about location of death from death certificates. Hospitalization rates among children 0-4 years old and adults 18-49 years old were higher than observed during the 2009 H1N1 pandemic (6). Burden estimates from the 2019–2020 season will be updated at a later date when data on contemporary testing practices become available. Activity began to decline in March, perhaps associated with community prevention measures for COVID-19 (5-6). From the Centers for Disease Control and Preventionpage called "Disease Burden of Influenza": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of influenza illnesses, medical visits, flu-associated hospitalizations, and flu-associated deaths that occur in the U.S. in a given season. You will be subject to the destination website's privacy policy when you follow the link. Among children, however, rates of influenza during the 2018–2019 season were similar to the 2017–2018 season. While the medical community is still learning about mortality from COVID-19, it does appear to be more deadly than the flu. To adjust for this, CDC collects data annually from participating FluSurv-NET sites on the amount of flu testing and the type of tests used at the site. To receive weekly email updates about Seasonal Flu, enter your email address: Centers for Disease Control and Prevention. The 2019–2020 influenza season was atypical in that it was severe for children aged 0-4 years and adults 18-49 years where rates of infections, medically attended illnesses, hospitalizations, and deaths were higher than those observed during the 2017-2018 season, a recent season with high severity (7). Influenza activity in the United States during the 2018–2019 season began to increase in November and remained at high levels for several weeks during January–February5. Influenza, commonly called "the flu", is an infectious disease caused by influenza viruses. This report summarizes the 2018-2019 influenza season in the temperate regions of the northern hemisphere. Lost in the discussion about COVID-19 is the fact that the US is experiencing a severe influenza season that has already resulted in more than 16 000 deaths. Influenza mortality in symptomatic cases in the US for the 2018/2019 season. Older adults also accounted for 62% of deaths, which is lower than recent previous seasons. The most updated crude rates of hospitalization for FluSurv-NET sites are available on FluView Interactive (6). View the reporting rates of influenza-like illness (ILI) consultations from General Practitioners in Scotland technical document. The influenza burden was higher in young children (0-4 years) and adults (18-49 years) compared with a recent season with the 2017-2018 season, a recent season with high severity, and provides evidence to support how severe seasonal influenza can be at any age. Why are these estimates lower than the preliminary in-season burden estimates last updated in April 2020? These estimates are an update to the preliminary in-season 2019-20 burden estimates published April 2020 and are based on more recently available information. That is longer than the average period of nine weeks during the last 20 years, but it is shorter than the extended influenza epidemic of 2017/2018 which lasted 18 weeks. CDC estimates that influenza was associated with more than 35.5 million illnesses, more than 16.5 million medical visits, 490,600 hospitalizations, and 34,200 deaths during the 2018–2019 influenza season. Select cause of death (ICD10 code search is available). We adjusted rates using the lowest multiplier from any season between 2010–2011 and 2017–2018. The Y axis goes to 1%. An estimated 7,800 deaths (36% of all deaths) occurred among working age adults (aged 18–64 years), an age group for which influenza vaccine coverage is often low (9). However children less than 5 years old also reported a relevant influenza attributable excess death rate in the 2014/15 and 2016/17 seasons (1.05/100,000 and 1.54/100,000 respectively). Influenza B viruses were not commonly reported among circulating viruses during the 2018–2019 season. However, it is useful to keep in mind that direct comparisons to influenza disease burden decades ago are complicated by large differences in the age of the US population and the increasing number of adults aged ≥65 years. Influenza season 2019 ... are already seeing increased rates of influenza hospitalisation. During the 2019-2020 flu season, CDC estimates flu caused: 38 million flu illnesses, about the same as the population of California. Freedom of Information | Released on 24 February 2021 Deaths from influenza 2020 . Division of Information, Evidence, Research and Innovation WHO Regional Office for Europe UN City Marmorvej 51 DK-2100 Copenhagen Ø Denmark Tel. The average annual mortality excess rate per 100,000 ranged from 11.6 to 41.2 with most of the influenza-associated deaths per year registered among the elderly. *2017–2018, 2018–2019, and 2019–2020 are preliminary estimates. The case fatality rate for influenza will obviously change year to year. Activity– Currently, influenza and influenza-like illness (ILI) activity is lower than average for this time of year compared to previous years, and is consistent with past activity following a peak in notifications and coming to the end of the influenza season. Seasonal influenza 2018–2019 Annual Epidemiological Report Key facts Influenza activity started in week 49/2018, peaked in week 7/2019 and returned to baseline levels in week 17/2019. We adjusted rates using the most conservative multiplier from any season between 2010–2011 and 2016–2017. Care 230 influenza women and In the temperate zones of the southern hemisphere, influenza activity returned to interseasonal levels. These testing data are often not available for up to 2 years after the end of a flu season, and thus the burden estimates are revised when additional testing data become available. 2020 weekly updates; 2019 weekly updates; 2018 weekly updates; 2017 weekly updates; 2016 weekly updates; 2015 weekly updates; 2014 weekly updates; … The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. However, influenza-associated pediatric deaths are likely under-reported as not all children whose death was related to an influenza virus infection may have been tested for influenza9,10. The season had moderate severity based on levels of outpatient influenza-like illness, hospitalizations rates, and proportions of pneumonia and influenza-associated deaths. It was reviewed by clinical, epidemiological and virological experts. Fifth, estimates of burden were derived from rates of influenza-associated hospitalization, which is a different approach than the statistical models used in older published reports. This ratio is based on data from prior seasons, which may not be accurate if patterns of care-seeking have changed. †95% Uncertainty intervals CDC estimates that the burden of illness during the 2019–2020 season was moderate with an estimated 38 million people sick with flu, 18 million visits to a health care provider for flu, 400,000 hospitalizations for flu, and 22,000 flu deaths (Table 1). You will be subject to the destination website's privacy policy when you follow the link. However, the graph in section 6 of the Winter Excess Mortality report above indicates that the highest number of weekly deaths in the 2018 to 2019 period occurred in week 1 of 2019… Patterns of fatality. But news reports and the World Health Organization often estimate it at around 0.1%. Note: The numbers below have been rounded off to millions. Thus, reports of laboratory-confirmed flu-related hospitalizations to FluSurv-NET are underestimates of the true number of hospitalizations. Differences: COVID-19 and the Flu Cause. Second, national rates of influenza-associated hospitalizations and in-hospital death were adjusted for the frequency of influenza testing and the sensitivity of influenza diagnostic assays, using a multiplier approach3. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. Continuous and high-quality surveillance data across China are needed to improve the estimation of the disease burden attributable to influenza and the best public health interventions are needed to curb this burden.
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