Create Account | Sign In: Author or Forum

Search Symptoms

Category: Family Medicine | Infections | Internal Medicine | Pediatrics | Journal

Back to Journal Articles

H1N1 Transmissibility Similar to Other Flu Viruses

Last Updated: December 30, 2009.

The 2009 H1N1 influenza virus proved to be less transmissible within households than viruses that caused previous pandemics, according to a study published in the Dec. 31 issue of the New England Journal of Medicine, while a second study of an outbreak in a school found that the natural history of the virus was similar to that of other flu viruses.

WEDNESDAY, Dec. 30 (HealthDay News) -- The 2009 H1N1 influenza virus proved to be less transmissible within households than viruses that caused previous pandemics, according to a study published in the Dec. 31 issue of the New England Journal of Medicine, while a second study of an outbreak in a school found that the natural history of the virus was similar to that of other flu viruses.

Simon Cauchemez, Ph.D., of Imperial College London, and colleagues analyzed data on 216 U.S. index patients and their 600 household contacts, and found that 78 (13 percent) of the contacts developed acute respiratory illness, 156 out of 216 households (72 percent) had no illness, 46 (21 percent) had one case, and 14 (6 percent) had more than one case.

Justin Lessler, Ph.D., of Johns Hopkins University in Baltimore, and colleagues looked at an April 2009 outbreak in a high school in Queens, N.Y., where 124 students and staff were confirmed cases of H1N1 flu, and found no reports of severe symptoms and that cases were linked with travel to Mexico.

"Although the disease characteristics estimated from this outbreak are similar to those for seasonal influenza strains, this should not make us complacent," the authors write. "Even modest increases in the rate of transmission or the severity of disease over the levels seen with interpandemic influenza strains could have a substantial impact on public health."

An author of the first study reported a financial relationship with Sanofi Pasteur.

Abstract - Cauchemez
Full Text
Abstract - Lessler
Full Text


Previous: Discharge Planning Measures May Not Cut Readmissions Next: Therapy Found Ineffective for Chronic Low Back Pain

Reader comments on this article are listed below. Review our comments policy.


Submit your opinion: