Track Flu Activity
For H1N1 updates, visit www.cdc.gov/h1n1flu/update. Note as of July 24, the CDC is no longer reporting case numbers. CDC will report the total number of hospitalizations and deaths each week, and will continue to use its traditional surveillance systems to track the progress of novel H1N1 in the U.S.
For all flu activity and flu epidemiological data (pandemic and seasonal) - visit www.cdc.gov/flu/weekly.
Sign up for RSS feeds and/or email updates on these sites to get information on the outbreak as it is made public. The CDC is also providing Twitter updates on the H1N1 situation.
Comprehensive Government Site on All Things Flu
www.flu.gov - The U.S. government’s site for all information on seasonal and pandemic flu. This repository offers information from various federal agencies (DHS, HHS, CDC, FDA), and has information on federal response plans, state and local response planning, information on vaccines and PPE, public service announcements, news alerts and more.
Flu.gov has a Twitter feed.
Reporting by World Health Organization (WHO)
WHO characterizes 2009 H1N1 as thus far causing mild illness, but being globally widespread and easily transmissible. This virus has spread in six weeks as far as past pandemics have taken six months to spread. However, increased global travel and economics most likely have much to do with the speed of global transmission.
In the News
CDC Releases New Estimates of Total Numbers of Cases and Deaths
On November 12, the CDC introduced new case and mortality numbers using an enhanced and in-depth estimation system based on a comprehensive review of actual reports.
- CDC estimates that between 14 million and 34 million cases of 2009 H1N1 occurred between April and October 17, 2009. The mid-level in this range is about 22 million people infected with 2009 H1N1.
- CDC estimates that between about 63,000 and 153,000 2009 H1N1-related hospitalizations occurred between April and October 17, 2009. The mid-level in this range is about 98,000 H1N1-related hospitalizations.
- CDC estimates that between about 2,500 and 6,000 2009 H1N1-related deaths occurred between April and October 17, 2009. The mid-level in this range is about 3,900 2009 H1N1-related deaths.
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