TYPHIM Vi is manufactured by Sanofi Pasteur for intramuscular use for protection against Typhoid Fever. It is a sterile solution, prepared from the purified polysaccharide capsule of Salmonella typhi (Ty 2 strain). The purified polysaccharide capsule is diluted in isotonic buffer solution which contains phenol as preservative. The vaccine is a clear, colourless solution. Each single dose of 0.5 mL is formulated to contain 0.025 milligrams of purified capsular polysaccharide, preserved with phenol (less than 1.25 mg per dose). The isotonic buffer solution contains 4.15 mg of sodium chloride, 0.065 mg of sodium phosphate dibasic dihydrate and 0.023 mg of sodium phosphate monobasic.