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Dynamics of infection in a population with 1,000; 5,500 and 100,000 individuals in contact with a environmental reservoir of toxigenic V. cholerae. In this reservoir, growth rate of V. cholerae oscillates due to variations in water temperature, for example. Line symbols are the same of figure 6. As in figures 6 and 7, seasonal growth of V. cholerae in the environment also triggers seasonal outbreaks of cholera.
