Evaluating Modes of Influenza Transmission (EMIT) data files
Nguyen-Van-Tam, Jonathan S.
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Uncertainty about the importance of influenza transmission by airborne droplet nuclei generates controversy for infection control. Human challenge-transmission studies have been supported as the most promising approach to fill this knowledge gap. Healthy, seronegative volunteer ‘Donors’ (n=52) were randomly selected for intranasal challenge with influenza A/Wisconsin/67/2005 (H3N2). ‘Recipients’ randomized to Intervention (IR, n=40) or Control (CR, n=35) groups were exposed to Donors for four days. IRs wore face shields and hand sanitized frequently to limit large droplet and contact transmission. One transmitted infection was confirmed by serology in a CR, yielding a secondary attack rate of 2.9% among CR, 0% in IR (p=0.47 for group difference), and 1.3% overall, significantly less than 16% (p<0.001) expected based on a proof-of-concept study secondary attack rate and considering that there were twice as many Donors and days of exposure. The main difference between these studies was mechanical building ventilation in the follow-on study, suggesting a possible role for aerosols.
- Influenza -- Transmission
- Influenza -- Epidemiology
- Influenza -- transmission
- Influenza Transmission Human Challenge Study
- Medicine and Dentistry::Clinical medicine
- R Medicine::RA Public aspects of medicine::RA 421 Public health. Hygiene. Preventive Medicine
- University of Nottingham, UK Campus
- University of Nottingham, UK Campus::Faculty of Medicine and Health Sciences
- University of Nottingham, UK Campus::Faculty of Medicine and Health Sciences::School of Medicine
- H-Vivo plc.
Data typeProtocol, Data files, and analysis files
- US CDC
- March to June 2013
- UK volunteers
Data collection methodProtocol for human challenge study
Legal and ethical issueswritten informed consent from healthy volunteers in accordance with the principles of the Declaration of Helsinki, in compliance with UK regulatory and ethical (IRB) requirements, and registered with ClinicalTrials.gov (number NCT01710111)
- The University of Nottingham