WHO and its partners are currently assessing the impact of these initial massimmunization campaigns, including their safety and efficacy.
世卫组织及其合作伙伴目前正在评估这些初始阶段的大规模免疫运动带来的影响，包括其安全性和效力。
2
It is estimated that a massimmunization campaign, promptly implemented, can prevent 70% of cases.
据估计，一次大规模免疫接种运动，如果得到及时实施，可预防70%的病例。
3
Recognition of the clustering of cases of aseptic meningitis has potentially been enhanced during massimmunization campaigns due to increased sensitivity of AEFI surveillance.