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While vaccines not covered by China's Expanded Program on Immunization can be received voluntarily with out-of-pocket payment, the uptake of self-paid vaccines in China is low.

To investigate willingness to pay (WTP) for self-paid vaccines and its determinants in China.

We interviewed 2160 randomly selected households with children 0–3 years old, in 108 communities from three provinces in 2013. A bidding game method was used to elicit WTP for two self-paid vaccines: 7-valent pneumococcal conjugate vaccine and influenza vaccine. We conducted multivariate linear regressions to determine factors affecting the WTP.

Median WTP for pneumococcal conjugate vaccine and influenza vaccine were Chinese Yuan 200 and 60 (10 US Dollars). 92% and 55% of respondents, respectively were not willing to pay the market price for these two vaccines. Lower price barrier and …