世卫组织在该领域的工作包括制定标准、加强免疫系统、管理疫苗质量和供应、资助以及研究与开发。
WHO's work in this area includes setting standards, strengthening immunization system, regulating vaccine quality and supply, finance, and research and development.
美国的食品以及药物管理委员会在去年4月份通过了对Provenge的审核，这个癌症疫苗强化了身体免疫系统，使免疫系统会主动攻击肿瘤。
The Food and Drug Administration last April finally approved Provenge, a prostate cancer vaccine that stimulates the body's own immune system to attack tumors.
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