The disease is also a risk, as members of tribal groups that have been contacted in the past have died of illnesses that they have no defense against.

疾病也是一种风险，因为过去接触过的部落成员都死于他们无法抵御的疾病。

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The people who died were older, had lower fitness levels, and had more cardiovascular risk factors.

那些死去的人，年纪大、健康状况不佳，罹患心血管疾病的风险因素较高。

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The WHO says half of the world's population is at risk of malaria and of an estimated 247 million cases in 2006, 881 000 people died, mostly African children.

世界卫生组织说世界上有将近一半的人口有感染疟疾的危险，到2006年估计有2.47亿例感染，881000人死于疟疾，其中绝大部分是非洲儿童。

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The boy, who was on the "at-risk" register, died aged 17 months in 2007 with major injuries, including a broken back.

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Those tailwinds have now died down, or risk doing so.

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The risk was further increased if the woman's baby had restricted growth or died in the womb, or if the woman had pre-existing risk factors for cardiovascular disease, such as tobacco smoking.

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