Household transmission of 2009 pandemic influenza A (H1N1) virus in the United States.

ABSTRACT:

Background

As of June 11, 2009, a total of 17,855 probable or confirmed cases of 2009 pandemic influenza A (H1N1) had been reported in the United States. Risk factors for transmission remain largely uncharacterized. We characterize the risk factors and describe the transmission of the virus within households.

Methods

Probable and confirmed cases of infection with the 2009 H1N1 virus in the United States were reported to the Centers for Disease Control and Prevention with the use of a standardized case form. We investigated transmission of infection in 216 households--including 216 index patients and their 600 household contacts--in which the index patient was the first case patient and complete information on symptoms and age was available for all household members.

Resul

SUBMITTER: Cauchemez S 

PROVIDER: S-EPMC3840270 | biostudies-literature | 2009 Dec

REPOSITORIES: biostudies-literature