Since yellow fever vaccination began in the 1930s, only 12 known cases of yellow fever post-vaccination have been identified, after 600 million doses have been dispensed.
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有证据显示,在这些极少数“疫苗失灵”病例中,所有病人都是在接种疫苗后五年内患病的。
Evidence showed that among this small number of “vaccine failures”, all cases developed the disease within five years of vaccination.
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这表明免疫力并不随时间而减退。
This demonstrates that immunity does not decrease with time.
“Looking at really very good evidence, it was quite clear to SAGE that in fact a single dose of yellow fever vaccine is effective.
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这对黄热病流行国来说极为重要,它们可以重新考虑本国的疫苗接种计划。
This is extremely important for countries where yellow fever is endemic, because it will allow them to reconsider their vaccine scheduling.
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这对旅客来说也很重要。”
It is also important for travelers.”
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黄热病概况
Yellow fever is an acute viral haemorrhagic disease transmitted by infected mosquitoes that is endemic to 44 countries in tropical areas of Africa and the Americas.
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黄热病是一种由受感染的蚊虫传播的急性病毒性出血疾病,在非洲和美洲热带地区44个国家中流行。
Estimated 200 000 new cases each year
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估计全世界每年有20万例黄热病。
There are an estimated 200 000 cases of yellow feverworldwide each year.