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Timeline showing the major events and breakthroughs in cholera research. (A) 16th to 18th century, (B) 19th century, (C) 20th century, (D) 21st century till 2015 are represented.
Source: Refs. a13; b18; c19; d16; e14,15; f17; g21; h22; i20; j21; k27; l22; m21; n23; o29; p30; q25; r31; s28; t32; u33; v39; w44; x65; y66; z67.
