This report provides an update to the international situation as of November 20, 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 November 8-14, 2009, influenza activity decreased slightly in the United States as reported in FluView. Flu activity is widespread in 43 states. Nationally, visits to doctors for influenza-like-illness declined from last week, but are still higher than expected for this time of year. Flu-related hospitalizations and deaths have declined slightly, but are still very high nation-wide compared to what is expected for this time of year.

These tables for healthcare providers and planners provide information related to spacing between the two doses of 2009 H1N1 Vaccine for children 6 months through 9 years of age and for administration of 2009 H1N1 Vaccine with seasonal influenza and other vaccines.

These tables for healthcare providers and planners provide information related to spacing between the two doses of 2009 H1N1 Vaccine for children 6 months through 9 years of age and for administration of 2009 H1N1 Vaccine with seasonal influenza and other vaccines.

These pictures provide a 3D graphical representation of the biology and structure of a generic influenza virus, and are not specific to the 2009 H1N1 virus.

During the week of November 8-14, 2009, influenza activity decreased slightly in the United States as reported in FluView. Flu activity is widespread in 43 states. Nationally, visits to doctors for influenza-like-illness declined from last week, but are still higher than expected for this time of year. Flu-related hospitalizations and deaths have declined slightly, but are still very high nation-wide compared to what is expected for this time of year.

On November 11, 2009, the FDA expanded the approved use of CSL's seasonal and 2009 H1N1 monovalent influenza vaccines to include children aged 6 months and older. Both vaccines had previously been approved only for use in adults, aged 18 years and older.

What is invasive pneumococcal disease? What does CDC know about invasive pneumococcal disease among people who get 2009 H1N1 or seasonal influenza? What is Active Bacterial Core surveillance (ABCs)?

People with certain types of disability have a higher risk of getting flu-related complications, such as pneumonia. The 2009 H1N1 Flu Information for People with Disabilities and Their Caregivers or Personal Assistants is now available to the public.

Questions and answers for renal dosing and administration for peramivir IV.

Every Friday, CDC will post updated 2009 H1N1 vaccine supply and distribution data. 26,248,100 doses have been shipped as of November 11, 2009.

During the week of November 1-7, 2009, influenza activity remained high in the United States as reported in FluView. Flu activity is widespread in 48 states. Nationally, visits to doctors for influenza-like-illness declined slightly from last week, but are still very high. Flu-related hospitalizations and deaths continue to increase and are very high nation-wide compared to what is expected for this time of year.

This report provides an update to the international situation as of November 13, 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 November 1-7, 2009, influenza activity continued to increase in the United States as reported in FluView. Flu activity is now widespread. Nationwide, visits to doctors for influenza-like-illness are increasing steeply and are now higher than what is seen at the peak of many regular flu seasons. In addition, flu-related hospitalizations and deaths continue to go up nation-wide and are above what is expected for this time of year.

This revised document updates the information for employed women so that it is consistent with the most recent infection control guidance posted by CDC.

CDC has developed a method to provide an estimated range of the total number of 2009 H1N1 cases, hospitalizations and deaths in the United States since April, 2009, as well as a breakdown of these estimates by age groups.

Influenza related information for people with diabetes.

Two different influenza vaccines are available this influenza season, and many people will be recommended to receive both the seasonal influenza vaccine and the 2009 influenza A (H1N1) 2009 monovalent vaccine (referred to in this document as 2009 H1N1 monovalent influenza vaccine). Below are some practical considerations for use of influenza vaccines. This information is only intended to address the current flu season and might change as the situation unfolds. This information is not intended to be applied to routine use during future seasonal influenza vaccination efforts.

This updated guidance replaces previously posted guidance entitled "Consideration Regarding Novel H1N1 Flu Virus in Obstetric Setting", dated July 6, 2009. Two steps are provided to guide the clinical management of labor, delivery and postpartum care of a mother with suspected or confirmed maternal infection with 2009 H1N1 flu, and care of the newborn.

Pneumococcal infections have been identified as an important complication in severe and fatal cases of 2009 H1N1 influenza virus infection. CDC has written a letter to providers urging them to make sure all their adult patients with indications have received the pneumococcal polysaccharide vaccine.