The following vaccine is developed against cholera -: (A) Dukoral, (B) Vi polysaccharide, (C) Ty 21a oral, (D) None
Answer is A. Two types of oral cholera vaccines : Dukoral and Sanchol Vi polysaccharide and Ty 21a oral are typhoid vaccines. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :233