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The case for reactive mass oral cholera vaccinationsReyburn, R; Deen, J L; Grais, RF; Bhattacharya, S K; Sur, D; Lopez, A L; Jiddawi, M S; Clemens, J D; von Seidlein, L; International Vaccine Institute (IVI), Seoul, Korea; Epicentre, Paris, France; NICED, Kolkata, India; Ministry of Health and Social Welfare, Zanzibar, Tanzania; Menzies School of Health Research, Casuarina, Australia (2011-01-25)The outbreak of cholera in Zimbabwe intensified interest in the control and prevention of cholera. While there is agreement that safe water, sanitation, and personal hygiene are ideal for the long term control of cholera, there is controversy about the role of newer approaches such as oral cholera vaccines (OCVs). In October 2009 the Strategic Advisory Group of Experts advised the World Health Organization to consider reactive vaccination campaigns in response to large cholera outbreaks. To evaluate the potential benefit of this pivotal change in WHO policy, we used existing data from cholera outbreaks to simulate the number of cholera cases preventable by reactive mass vaccination.