疫苗可预防疾病的儿童死亡人数首次下降到1000万以下，去年继续下降到920万的估计数。
For the first time, childhood deaths from vaccine-preventable diseases dropped below the 10 million mark, sinking to an estimated 9.2 million deaths last year.
在此之前，他已在本组织工作20余年，最初是在南太平洋岛屿防治麻风病，随后处理疫苗可预防的疾病，包括脊髓灰质炎。
Before that, he had worked for more than 20 years for the Organization, first battling leprosy in the South Pacific islands, then tackling vaccine preventable diseases including polio.
结核病以及疫苗可预防的疾病死灰复燃等具体事件显示，基础卫生系统能力急剧下降。
Specific events, such as the resurgence of tuberculosis and the return of vaccine-preventable diseases, pointed to an alarming deterioration in basic health system capacity.
一项暂定目标是到2015年之前将研制和许可使用第一代具有一年以上50%预防功效的疫苗，可预防严重疾病和死亡。
An interim landmark would be to develop and license a first-generation vaccine by 2015 with 50% protective efficacy against severe disease and death that would last longer than one year.
麻疹是一种引起并发症并造成死亡的传染性很强的疾病，即便是在既往健康的人员中也是如此，但是通过疫苗接种可完全得到预防。
Measles is a highly infectious disease that causes complications and deaths, even in previously-healthy individuals, but is fully preventable by vaccination.
然而，即便疫苗和病毒周期不能很好的匹配，疫苗也可降低疾病的严重程度或对预防流感相关的并发症起到帮助。
However, even if the vaccine and the circulating strains are not an exact match, the vaccine may reduce the severity of the illness or may help prevent influenza-related complications.
然而，即便疫苗和病毒周期不能很好的匹配，疫苗也可降低疾病的严重程度或对预防流感相关的并发症起到帮助。
However, even if the vaccine and the circulating strains are not an exact match, the vaccine may reduce the severity of the illness or may help prevent influenza-related complications.
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