Article published in the New England Journal of Medicine on 24-Feb-2005 by Lucas ME et al.

Article published in The Lancet Infectious Diseases on 4-Sep-2012 by Khatib, A. M. et al.

BACKGROUND: Zanzibar, in east Africa, has been severely and repeatedly affected by cholera since 1978. We assessed the effectiveness of oral cholera vaccination in high-risk populations in the archipelago to estimate the indirect (herd) protection conferred by the vaccine and direct vaccine effectiveness.

Article published in PLoS Neglected Tropical Diseases on 25-Jan-2011 by Anh, D. D. et al.