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The Centers for Disease Control and Prevention (CDC) identified the first two A/09(H1N1) swine flu cases in California on April 17, 2009, via the Border Infectious Disease Program, [135] for a San Diego County child, and a naval research facility studying a special diagnostic test, where influenza sample from the child from Imperial County was tested. [136]
The United States experienced the beginnings of a pandemic of a novel strain of the influenza A/H1N1 virus, commonly referred to as "swine flu", in the spring of 2009.The earliest reported cases in the US began appearing in late March 2009 in California, [114] then spreading to infect people in Texas, New York, and other states by mid-April. [115]
The CDC discontinued reporting of individual confirmed and probable cases of novel H1N1 infection on July 24, 2009. The CDC will report the total number of hospitalizations and deaths weekly, and continue to use its traditional surveillance systems to track the progress of the novel H1N1 flu outbreak. [119]
This page summarises the figures from the WHO Influenza A Situation Updates issued roughly once every other day, [1] and since 6 July from ECDC.For each country or territory, the table lists the number of confirmed cases of swine flu on the first reported day each month, and the latest figure.
The highest number of deaths in children was 288 during the 2009-2010 season, which was during the height of the H1N1 swine flu pandemic. The CDC report also noted that flu vaccine use in children ...
US influenza statistics by flu season. From the Centers for Disease Control and Prevention page called "Disease Burden of Flu": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of flu illnesses, medical visits, hospitalizations, and deaths related to flu that occurred in a given season.
The recent rise in cases prompted the CDC to announce Dec. 20 as the start of the 2024-25 flu season and urged those over the age of 6 months to vaccinate against the virus.
The CDC estimated in a Nov. 22 post on its website that 724 pediatric flu deaths might have occurred last year. Fewer flu shots and an unusually long flu season are two likely factors.