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。
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 defence against, ranging from chicken pox to the common cold.
疾病也是一个危机，正如过去曾经接触过的，都已经死于疾病的其他部落的成员一样，他们没有任何的疾病防御，从水痘到普通的感冒都一样。
Many children died very young from these diseases and others, and the weak and elderly were always at risk。
许多儿童因此夭折(也有其他原因)，年迈题弱的人也总是面临着它们的威胁。
Furthermore, estimates of risk for progression could have been biased by patients who died before their nephropathy might have progressed.
此外，对进展的风险估计可能有偏差，因为有些病人去世时肾病可能已经进展。
Furthermore, estimates of risk for progression could have been biased by patients who died before their nephropathy might have progressed.
此外，对进展的风险估计可能有偏差，因为有些病人去世时肾病可能已经进展。
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