Objective To develop a quantitative ELISA for monitoring the manufacturing process of enterovirus 71 vaccine.Methods A double antibody sandwich ELISA was developed by using a monoclonal antibody against EV71 as capture antibody and a HRP conjugated rabbit against EV71 antibody as detecting antibody. The ELISA kit was tested for linear range and validated for accuracy,precision,specificity,robustness and stability. The EV71 antigen yields were determined by the ELISA in tested samples in preparation of bulk ...