Morbidity and Mortality Weekly Report (MMWR) April 2, 2010 / 59(12); 363-368

Morbidity and Mortality Weekly Report (MMWR) April 2, 2010 / 59(12);357-362

During week 12 (March 20-27, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 97 (3.5%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division were positive for influenza.

Although flu activity remains relatively low nationally, the Southeast United States is experiencing continued regional activity, according to the March 21-27, 2010 FluView. Most flu continues to be 2009 H1N1. Flu activity, caused by either 2009 H1N1 or seasonal flu viruses, may rise and fall, but is expected to continue for weeks in the U.S. Internationally, 2009 H1N1 flu is still circulating, including in the Southern Hemisphere, which is about to enter its flu season. For more information, please see the international situation update.

NEW: This page provides information and links for travelers who want to reduce their risk of becoming sick with 2009 H1N1

Transcript for March 29, 2010 telebriefing. Surgeon General Regina M. Benjamin, M.D., M.B.A. Anne Schuchat, M.D., Director, National Center for Immunization and Respiratory Diseases. "We are continuing to see people with serious illness from the pandemic H1N1 virus, especially in some of the southeastern states, and vaccination is the best way to protect yourself and those you love from further illness or death and..."

3D graphical representations of the biology and structure of a generic influenza virus.

While flu activity remains relatively low nationally, the Southeast is experiencing increases in activity, according to the March 14-20, 2010 FluView. Most flu continues to be 2009 H1N1. Flu activity, caused by either 2009 H1N1 or seasonal flu viruses, may rise and fall, but is expected to continue for weeks.

Morbidity and Mortality Weekly Report (MMWR)March 26, 2010 / 59(11);321-326

The purpose of this document is to address questions raised by the 2009 H1N1 influenza vaccine with long expiration dates (i.e. 2011).