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Volume 23, Number 2—February 2017
Research

Estimated Effect of Inactivated Poliovirus Vaccine Campaigns, Nigeria and Pakistan, January 2014–April 2016

George Shirreff, Mufti Zubair Wadood, Rui Gama Vaz, Roland W. Sutter, and Nicholas C. GrasslyComments to Author 
Author affiliations: Imperial College London, London, UK (G. Shirreff, N.C. Grassly); World Health Organization (WHO), Islamabad, Pakistan (M.Z. Wadood); WHO, Abuja, Nigeria (R.G. Vaz); WHO Global Polio Eradication Initiative, Geneva, Switzerland (R.W. Sutter)

Main Article

Figure 1

Effect of mass vaccination campaigns with inactivated poliovirus vaccine plus trivalent oral poliovirus vaccine (IPV+tOPV) or tOPV alone on poliovirus detection in persons or the environment, Nigeria and Pakistan, 2014–2016. The incidence rate ratio for poliomyelitis and the prevalence ratio for poliovirus detection in environmental samples (sewage) during 90 days after compared with 90 days before mass vaccination campaigns are shown for Nigeria (A) and Pakistan (B) and can be compared with the

Figure 1. Effect of mass vaccination campaigns with inactivated poliovirus vaccine plus trivalent oral poliovirus vaccine (IPV+tOPV) or tOPV alone on poliovirus detection in persons or the environment, Nigeria and Pakistan, 2014–2016. The incidence rate ratio for poliomyelitis and the prevalence ratio for poliovirus detection in environmental samples (sewage) during 90 days after compared with 90 days before mass vaccination campaigns are shown for Nigeria (A) and Pakistan (B) and can be compared with the complete data and estimates (Technical Appendix Tables 1, 3). The estimates (diamonds) are shown with 95% CIs (error bars); the dashed error bars indicate when the upper CI exceeded the plot limit of 1.4.

Main Article

Page created: November 16, 2016
Page updated: January 17, 2017
Page reviewed: January 17, 2017
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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