Clemens JD, van Loon F, Sack DA, Rao MR, Ahmed F, ChakrabortY J, Kay BA, Khan MR, Yunus MD, Harris JR, et al. Biotype as determinant of natural immunising effect of cholera. Lancet. 1991 Apr 13;337(8746):883-4.
Clemens JD, van Loon F, Sack DA, Rao MR, Ahmed F, ChakrabortY J, Kay BA, Khan MR, Yunus MD, Harris JR, et al. Biotype as determinant of natural immunising effect of cholera. Lancet. 1991 Apr 13;337(8746):883-4.