The Influenza Division at CDC collects, compiles and analyzes information on influenza activity year-round in the United States.
The CDC has released a 2018 flu map tracking how widely influenza has spread this flu season and which states were hit when This season's deadly flu is all over the continental U.S. Since then it has played a leading role in the global network. Saving Lives, Protecting People CDC twenty four seven.
The growing number of deaths in the U.S. surpasses the seasonal flu, which
Health. An activity level of 1 corresponds to values that are below the mean, level 2 corresponds to an ILI percentage less than 1 standard deviation above the mean, level 3 corresponds to ILI more than 1, but less than 2 standard deviations above the mean, and so on, with an activity level of 10 corresponding to ILI 8 or more standard deviations above the mean.The ILI Activity Indicator map reflects the level of ILI activity, not the extent of geographic spread of flu, within a jurisdiction. IHSP sites included IA, ID, MI, OK and SD during the 2009-2010 season; ID, MI, OH, OK, RI, and UT during the 2010-2011 season; MI, OH, RI, and UT during the 2011-2012 season; IA, MI, OH, RI, and UT during the 2012-2013 season; and MI, OH, and UT during the 2013-2014 through 2019-20 seasons.Cases are identified by reviewing hospital laboratory and admission databases and infection control logs for patients hospitalized during the influenza season with a documented positive influenza test (i.e., viral culture, direct/indirect fluorescent antibody assay (DFA/IFA), rapid influenza diagnostic test (RIDT), or molecular assays including reverse transcription-polymerase chain reaction (RT-PCR)).
Information in this report is categorized by influenza transmission zones, which are geographical groups of countries, areas or territories with similar influenza transmission patterns. There are 10 activity levels classified as minimal (levels 1-3), low (levels 4-5), moderate (levels 6-7), and high (levels 8-10). About CDC’s Flu Forecasting Efforts; How CDC Uses Flu Forecasting; Why CDC Supports Flu Forecasting; Past Flu Seasons Flu Forecasting Accuracy Results; Health Professionals plus icon. Saving Lives, Protecting People Visit For the latest summaries of global influenza surveillance, visit To receive weekly email updates about Seasonal Flu, enter your email address:Centers for Disease Control and Prevention. The IHSP began during the 2009-2010 season to enhance surveillance during the 2009 H1N1 pandemic.
As the weeks of flu season from 2018 into 2019 progress, the map is updated and more information about the estimates is added. This series of dynamic visualizations allow any Internet user to access influenza information collected by CDC’s monitoring systems.Data collected in ILINet are used to produce a measure of ILI(influenza like illness) activity* by state. The network includes more than 70 counties in the 10 Emerging Infections Program (EIP) states (CA, CO, CT, GA, MD, MN, NM, NY, OR, and TN) and additional Influenza Hospitalization Surveillance Project (IHSP) states. Health Care Workers Need … ET July 20, 2020. In early January of each season, observed case counts across all FluSurv-NET sites will be compared against predetermined thresholds to determine whether sampling will be implemented for the season.Additional pneumonia and influenza mortality data for current and past seasons and by geographic level (national, HHS region, and state) are available on Additional information on influenza-associated pediatric deaths including basic demographics, underlying conditions, bacterial co-infections, and place of death for the current and past seasons, is available on It is important to remember the following about influenza surveillance in the United States.For CDC/Influenza Division influenza surveillance purposes, the reporting period for each influenza season begins during To receive weekly email updates about Seasonal Flu, enter your email address:Centers for Disease Control and Prevention. Data presented from clinical laboratories include the weekly total number of specimens tested, the number of positive influenza tests, and the percent positive by influenza virus type. The virological data entered into FluNet, e.g.
CDC's Influenza Division has served as a WHO Collaborating Center for Surveillance, Epidemiology, and Control of Flu in Atlanta, GA since 1956.
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A weekly influenza surveillance report prepared by the Influenza Division. Current United States Flu Activity Map; Weekly U.S. The 10 activity levels correspond to the number of standard deviations below, at or above the mean for the current week compared with the mean of the non-influenza weeks.
Meanwhile, the virus, officially known as COVID-19, has spread to dozens of countries in regions around the world.Turn on desktop notifications for breaking stories about interest? Influenza update - 373 03 August 2020 - Update number 373, based on data up to 19 July 2020. But many others are cases of unknown origin, or community spread, where there is no known nexus to travel.
The U.S. influenza surveillance system is a collaborative effort between CDC and its many partners in state, local, and territorial health departments, public health and clinical laboratories, vital statistics offices, healthcare providers, clinics, and emergency departments. Of those cases in the U.S. (pictured above), at least 48 were diagnosed in individuals who were repatriated to the United States on government charter flights from Wuhan, China, and from the Diamond Princess cruise ship. All other sites performed full chart abstractions on all cases.
Instead, the respiratory disease is more akin to severe pneumonia, and in serious cases, patients experiencing difficulty breathing have been hospitalized and put on ventilators.
CDC recommends that travelers avoid all nonessential international travel.
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