Assessing willingness to pay for HIV vaccines in Vietnam: A contingent valuation method study

Objective: HIV has infected approximately 75 million people worldwide with over half dying from AIDS-related diseases. This study aimed to determine individuals’ willingness to pay (WTP) for future HIV vaccines. Methods: A cross sectional study was conducted in December 2022 in Southern Vietnam with 1 675 face-to-face interviews. WTP was determined using the contingent valuation method with two bidding games under three vaccine efficacy scenarios (high, medium, low) for both self-vaccination and child vaccination. Results: Among 1 655 valid respondents, 553 were willing to pay for their children’s vaccination. Overall, the WTP of adults for the HIV vaccine was (4961 264±3793 652) VND (23700 VND = 1 US dollar). The WTP of parents is (4947 799±4930 721) VND for self-vaccination and (4865 399±4064 567) VND for vaccinating their children. Average WTP decreased with lower vaccine efficacy and lower bid prices. Education level, marital status, occupation, and monthly income were significantly associated with WTP for all vaccination types. Conclusions: In this study, high WTP rates and numerous individuals willing to pay for HIV vaccines were found. These findings can help decision-makers understand factors influencing WTP for future HIV vaccines and provide evidence for developing funding programs and budgeting plans for introducing such vaccines in Vietnam.