Related Experiment Video
Updated: Jun 4, 2026

Nasal Wipes for Influenza A Virus Detection and Isolation from Swine
Published on: December 4, 2015
Transmission of 2009 pandemic influenza A (H1N1) at a Public University--Delaware, April-May 2009
Alice Guh1, Carrie Reed, L Hannah Gould
1Epidemic Intelligence Office, Centers for Disease Control and Prevention, Atlanta, Georgia, USA. ggt4@cdc.gov
Abstract:
We investigated the first documented university outbreak of the 2009 pandemic influenza A(H1N1) to identify factors associated with disease transmission. An online student survey was administered to assess risk factors for influenza-like illness (ILI), defined as fever with cough or sore throat. Of 6049 survey respondents, 567 (9%) experienced ILI during 27 March to 9 May 2009. Studying with an ill contact (adjusted risk ratios [aRR], 1.29; 95% confidence intervals [CI], 1.01-1.65) and caring for an ill contact (aRR, 1.51; CI, 1.14-2.01) any time during 27 March to 9 May were predictors for ILI. Respondents reported that 680 (6%) of 11,411 housemates were ill; living with an ill housemate was a predictor for ILI (RR, 1.38; CI, 1.04-1.83). Close contact or prolonged exposures to ill persons were likely associated with experiencing ILI. Self-protective measures should be promoted in university populations to mitigate transmission.
Related Concept Videos
Influenza
Infectious Diseases and Their Occurrence
Transmission of Pathogens
Transmission-based Precautions II: Airborne and Protective Environment
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Transmission-based Precautions I: Contact, Enteric, and Droplets
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
Viral Recombination

