Objective To evaluate the safety of adsorbed diphtheria,tetanus and acellular pertussis combined vaccine(DTaP)manufactured by Wuhan Institute of Biological Products Co.,Ltd(WIBP). Methods A multicenter,random,double blind and parallel controlled clinical trial was performed on 1 331 healthy infants aged 3 ~ 6 months in Chengdu and Xi'an Cities, without history of inoculation with the vaccine or the history of the relevant diseases. The infants were randomly divided into trial and control groups according to...