Household demand for typhoid fever vaccines in Hue, Vietnam

International Vaccine Institute, Seoul, KoreaThe demand function for vaccines against typhoid fever was estimated using stated preferencedata collected from a random sample of 1065 households in Hue, Vietnam, in 2002. These are the firstestimates of private willingness-to-pay (WTP) and demand functions for typhoid vaccines in adeveloping country. Mean respondent WTP for a single typhoid fever vaccine ranged from US$2.30 toUS$4.80. Mean household WTP estimates (vaccinating all members of the household) ranged fromUS$21 to US$27. Demand was similar for vaccines with different degrees of effectiveness and intervalsof duration. These results suggest a significant potential for private sector provision of typhoid fevervaccines in Hue.Key words: private demand, vaccines, willingness-to-pay, typhoid fever vaccines, contingent valuation