Swine Flu Poses No Serious Threat Than Seasonal Flu: Study

Study on Swine Flu

Infection rom the 2009 A(H1N1) pandemic virus presented a lower risk of serious complications than other recent strains of the flu, according to US research presented Tuesday. Analysis of influenza cases in the midwestern US state of Wisconsin showed infected individuals were younger than in earlier strains, but complications were not as likely as with the H3N1 virus that arose in the 2007-2008 flu season, said researchers at Wisconsin's Marshfield Clinic Research Foundation.

"The pandemic 2009 influenza A(H1N1) virus caused widespread transmission in the United States and other countries," noted lead author Edward Belongia and colleagues in the September 8 issue of the Journal of the American Medical Association(JAMA).According to Centers for Disease Control and Prevention (CDC) estimates, the United States saw 43 million to 89 million infections from April 2009 to April 2010, "with mid-range estimates of 274,000 H1N1-related hospitalizations and 12,470 deaths," including seasonal and pandemic strains, said the study. 

However in its localized study in the state, researchers compared the characteristics of pandemic and seasonal influenza infections occurring in that defined population, drawing from a pool of 6,874 patients in three flu seasons starting in 2007. Researchers identified 545 H1N1 pandemic influenza cases in 2009, and 221 cases of the seasonal H1N1 flu, and 632 patients with H3N2 infection from the 2007-2008 season. Children, which the 2009 H1N1 pandemic infection appeared to disproportionately affect, were not associated with more hospital admission or pneumonia cases when compared with seasonal H1N1 or H3N2, said the study.

Posted in: Swine Flu Poses No Serious Threat Than Seasonal Flu: Study