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Volume 22, Number 6—June 2016

Population-Level Effect of Cholera Vaccine on Displaced Populations, South Sudan, 2014

Andrew S. AzmanComments to Author , John Rumunu, Abdinasir Abubakar, Haley West, Iza Ciglenecki, Trina Helderman, Joseph Francis Wamala, Olimpia de la Rosa Vázquez, William Perea, David A. Sack, Dominique Legros, Stephen Martin, Justin Lessler, and Francisco J. Luquero
Author affiliations: Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA (A.S. Azman, D.A. Sack, J. Lessler, F.J. Luquero); Ministry of Health, Juba, South Sudan (J. Rumunu); World Health Organization, Juba (A. Abubakar, J.F. Wamala); International Organization for Migration, Juba (H. West); Médecins Sans Frontières, Geneva, Switzerland (I. Ciglenecki); Medair, Ecublens, Switzerland (T. Helderman); Médecins Sans Frontières, Barcelona, Spain (O. de la Rosa Vázquez); World Health Organization, Geneva (W. Perea, D. Legros, S. Martin); Epicentre, Paris, France (F.J. Luquero)

Main Article


Effect of oral cholera vaccine by location, South Sudan, 2014*

Variable Location
Juba† Tongping UN House Wau Shilluk† Malakal
Setting type Community PoC Camp PoC Camp IDP camp PoC camp
Population vaccinated No Yes Yes No Yes
Population at risk 387,512 14,015 17,627 39,000 17,000
No. cases/10,000 persons 53.4 51.3 48.8 236.4 38.8
No. cases/10,000 children <5 y of age 56.0 186.5 146.5
Risk ratio, children <5 y compared with those >5 y of age 1.0 3.6 3.0
No. days with Rt >1 16‡ 2‡ 2‡ 14‡ 2‡
Maximum Rt 2.4 1.5 1.5 2.2 1.9

*IDP, internally displaced person; PoC, protection of civilian; Rt, reproductive number; UN, United Nations; –, no age-specific population data available.
†Reference population.
‡Significant difference (p<0.0001) in number of days with Rt >1, compared with reference population.

Main Article

Page created: May 16, 2016
Page updated: May 16, 2016
Page reviewed: May 16, 2016
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