Prioritization of Vaccines for Inclusion into China's Expanded Program on Immunization: Evidence from Experts' Knowledge and Opinions.

A modified Delphi technique effectively built a scientific, rational, comprehensive, and systematic indicator system for prioritizing vaccine candidates for consideration of inclusion into the EPI. The rank order will be used by the technical working groups of China's National Immunization Advisory Committee to sequentially develop and present Evidence-to-Recommendation tables for making policy recommendations.