This report provides an update to the international situation as of December 18, 2009. The World Health Organization (WHO) continues to report updated 2009 H1N1 flu-associated laboratory-confirmed cases and deaths on its Web page.

During the week of December 6, 2009-December 12, 2009, flu activity declined in the United States as reported in FluView. The number of states reporting widespread flu activity decreased from 14 to 11.

These interim recommendations refer to patients who are severely immunosuppressed as a result of receiving treatment for malignancies; or as a result of receiving treatment related to solid organ or hematopoietic stem cell transplants; or as a result of autoimmune conditions and treatment. In addition to this guidance, there are documents available for caregivers of adult and adolescent HIV-infected patients as well as for patients with rheumatological diseases

This document features several questions and answers regarding the recent Sanofi Pasteur voluntary recall of the H1N1 Pediatric (0.25 mL, for 6-35 month olds) vaccine in pre-filled syringes.

This is a quick overview of what pregnant women need to know about 2009 H1N1 flu. It is in downloadable format for use in doctor's offices or by individuals.

This is a quick overview of what pregnant women need to know about 2009 H1N1 flu. It is in downloadable format for use in doctor's offices or by individuals.

During the week of November 29-December 5, 2009, flu activity declined in the United States as reported in FluView. The number of states reporting widespread flu activity decreased from 25 to 14.

Morbidity and Mortality Weekly Report (MMWR) December 11, 2009 /Vol. 58/ No. 48 / p1341-1344

As of December 8, 2009, there have been 33,490 laboratory-confirmed influenza-associated hospitalizations and 1,445 deaths in the U.S. from August 30 to December 5, 2009.

Questions and Answers on the 2009 H1N1 burden of mortality and American Indians and Alaska Natives.

These questions and answers summarize the current understanding of the impact of 2009 H1N1 and seasonal influenza virus on African Americans, describe some of the barriers to uptake of 2009 H1N1 and seasonal influenza vaccines, and outline potential strategies for improving health and increasing vaccine coverage in African American communities.

CDC has updated its estimates of the total number of 2009 H1N1 cases, hospitalizations and deaths in the United States since April, 2009.

A summary of CDC's updated estimates on 2009 H1N1 cases, hospitalizations and deaths.

Weekly 2009 H1N1 Flu Media Briefing

This document provides answers to frequently asked questions about H1N1 vaccine. It also has updated information on vaccine project areas and distribution at the state and local level.

Information regarding use of intravenous peramivir under an emergency use authorization. Information on availability of renal dosing for peramivir. Updated oseltamivir dosing instructions for children younger than 1 year of age based on weight.

Will you know what to do if someone in your home gets the flu? This new online guide from CDC provides step-by-step instructions on how to care for someone sick in your home. Learn what you can do to help your family this flu season.

This report provides an update to the international situation as of December 4, 2009. The World Health Organization (WHO) continues to report updated 2009 H1N1 flu-associated laboratory-confirmed cases and deaths on its Web page.

Significant increases in the proportion of hospitalized adults and children being treated with influenza antiviral drugs have been noted during the 2009 H1N1 pandemic compared to the proportion of adults and children that have been treated with flu antiviral drugs during past seasonal influenza epidemics.

Morbidity and Mortality Weekly Report (MMWR) December 4, 2009 / Vol. 58 (Early Release) / p1-6