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Volume 17, Number 6?June 2011
Research
Use of Antiviral Drugs to Reduce Household Transmission of Pandemic (H1N1) 2009, United Kingdom1
Richard G. Pebody, Comments to Author Ross Harris, George Kafatos, Mary Chamberland, Colin Campbell, Jonathan S. Nguyen-Van-Tam, Estelle McLean, Nick Andrews, Peter J. White, Edward Wynne-Evans, Jon Green, Joanna Ellis, Tim Wreghitt, Sam Bracebridge, Chikwe Ihekweazu, Isabel Oliver, Gillian Smith, Colin Hawkins, Roland Salmon, Brian Smyth, Jim McMenamin, Maria Zambon, Nick Phin, and John M. Watson
Author affiliations: Health Protection Agency, London, UK (R.G. Pebody, R. Harris, G. Kafatos, M. Chamberland, C. Campbell, J.S. Nguyen-Van-Tam, E. McLean, N. Andrews, P.J. White, E. Wynne-Evans, J. Green, J. Ellis, T. Wreghitt, S. Bracebridge, C. Ihekweazu, I. Oliver, G. Smith, C. Hawkins, M. Zambon, N. Phin, J.M. Watson); Imperial College, London (P.J. White); Public Health Wales, Cardiff, Wales, UK (R. Salmon); Public Health Agency Northern Ireland, Belfast, Northern Ireland (B. Smyth); and Health Protection Scotland, Glasgow, Scotland (J. McMenamin)
Suggested citation for this article
Abstract
The United Kingdom implemented a containment strategy for pandemic (H1N1) 2009 through administering antiviral agents (AVs) to patients and their close contacts. This observational household cohort study describes the effect of AVs on household transmission. We followed 285 confirmed primary cases in 259 households with 761 contacts. At 2 weeks, the confirmed secondary attack rate (SAR) was 8.1% (62/761) and significantly higher in persons <16 years of age than in those >50 years of age (18.9% vs. 1.2%, p<0.001). Early (<48 hours) treatment of primary case-patients reduced SAR (4.5% vs. 10.6%, p = 0.003). The SAR in child contacts was 33.3% (10/30) when the primary contact was a woman and 2.9% (1/34) when the primary contact was a man (p = 0.010). Of 53 confirmed secondary case-patients, 45 had not received AV prophylaxis. The effectiveness of AV prophylaxis in preventing infection was 92%.
full article
http://www.cdc.gov/eid/content/17/6/990.htm
Volume 17, Number 6?June 2011
Research
Use of Antiviral Drugs to Reduce Household Transmission of Pandemic (H1N1) 2009, United Kingdom1
Richard G. Pebody, Comments to Author Ross Harris, George Kafatos, Mary Chamberland, Colin Campbell, Jonathan S. Nguyen-Van-Tam, Estelle McLean, Nick Andrews, Peter J. White, Edward Wynne-Evans, Jon Green, Joanna Ellis, Tim Wreghitt, Sam Bracebridge, Chikwe Ihekweazu, Isabel Oliver, Gillian Smith, Colin Hawkins, Roland Salmon, Brian Smyth, Jim McMenamin, Maria Zambon, Nick Phin, and John M. Watson
Author affiliations: Health Protection Agency, London, UK (R.G. Pebody, R. Harris, G. Kafatos, M. Chamberland, C. Campbell, J.S. Nguyen-Van-Tam, E. McLean, N. Andrews, P.J. White, E. Wynne-Evans, J. Green, J. Ellis, T. Wreghitt, S. Bracebridge, C. Ihekweazu, I. Oliver, G. Smith, C. Hawkins, M. Zambon, N. Phin, J.M. Watson); Imperial College, London (P.J. White); Public Health Wales, Cardiff, Wales, UK (R. Salmon); Public Health Agency Northern Ireland, Belfast, Northern Ireland (B. Smyth); and Health Protection Scotland, Glasgow, Scotland (J. McMenamin)
Suggested citation for this article
Abstract
The United Kingdom implemented a containment strategy for pandemic (H1N1) 2009 through administering antiviral agents (AVs) to patients and their close contacts. This observational household cohort study describes the effect of AVs on household transmission. We followed 285 confirmed primary cases in 259 households with 761 contacts. At 2 weeks, the confirmed secondary attack rate (SAR) was 8.1% (62/761) and significantly higher in persons <16 years of age than in those >50 years of age (18.9% vs. 1.2%, p<0.001). Early (<48 hours) treatment of primary case-patients reduced SAR (4.5% vs. 10.6%, p = 0.003). The SAR in child contacts was 33.3% (10/30) when the primary contact was a woman and 2.9% (1/34) when the primary contact was a man (p = 0.010). Of 53 confirmed secondary case-patients, 45 had not received AV prophylaxis. The effectiveness of AV prophylaxis in preventing infection was 92%.
full article
http://www.cdc.gov/eid/content/17/6/990.htm