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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 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]
Unlike most strains of influenza, the pandemic H1N1/09 virus did not disproportionately infect adults older than 60 years; this was an unusual and characteristic feature of the H1N1 pandemic. [18] Even in the case of previously healthy people, a small percentage develop pneumonia or acute respiratory distress syndrome (ARDS). This manifests ...
Bird Flu Uptick In Us Has Cdc On Alert For Pandemic 'Red Flags': Report The CDC estimates there have been at least 24 million illnesses, 310,000 hospitalizations and 13,000 deaths from the flu so ...
Because reported numbers represented only confirmed cases, they were a "very great understatement" of the total number of cases of infection, according to the CDC. [320] From 12 April 2009 to 10 April 2010, CDC estimated there were 60.8 million cases, 274,304 hospitalizations, and 12,469 deaths in the US due to the virus. [321]
A(H1N1) Outbreak and Pandemic Milestones in North America 17 March: First case in the world of what would later be identified as swine flu. 28 March First case in the US of what would later be identified as swine flu. 12 April First known death due to what would later be identified as swine flu. 25 April Community outbreaks confirmed in United ...
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.
For instance, the Illinois Department of Public Health updated the number of confirmed cases in Illinois to 225 at 10 a.m. CT on May 6, 2009, [115] while the CDC update at 11:00 AM ET that day showed only 122 confirmed cases in Illinois. [116] The CDC report also currently lists one trans-state case.