目的了解北京市2005年接种吸附百白破联合疫苗(DPT)后无菌化脓病例增多的原因，保证安全接种。

Objective to understand the cause for the increase of sterile abscess cases upon DPT (whole cell) vaccination in 2005 in Beijing, so as to control the AEFI rate and improve vaccination safety.

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我们对新配方吸附及不吸附的百白破混合制剂进行了人群使用反应及效果观察。

We observed the reaction and the immune effect of anew formular for DPT vaccine with or without adsorption in field trial.

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