Fig. 2.

Oral cholera vaccination survey areas, Lake Chilwa, Malawi, 2016

Note: We divided the target population for the survey into three strata according to the strategy used to administer the second vaccine dose: (i) the standard strategy was used for people living on the shores of Lake Chilwa; (ii) a simplified cold-chain strategy was used for people living on islands in the lake; and (iii) an out-of-cold-chain strategy was used for fishermen living on zimboweras, which are temporary floating homes built for the fishing season.