Illnesses result in hospitalizations and deaths mainly among high-risk groups (the very young, elderly or chronically ill).

疾病造成住院和死亡，主要是在高危人群中(婴幼儿、老年人或慢性病患者)。

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In wealthy nations, the health impact of chronic diseases has been masked by the identification of high-risk groups and early detection of disease.

富裕国家中，随着确定高危人群和早期发现疾病，慢性病对健康的影响得以遮掩。

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Vaccination is only recommended as a prophylactic measure for high-risk groups (e.g. laboratory personnel who are constantly exposed to the risk of contamination).

只建议将预防接种作为高危人群(如经常暴露于污染危险的实验室人员)的预防措施。

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Other life insurers, who consider the company to be a leader in insuring high-risk groups, are watching carefully.

ECONOMIST: Taking a risk

Focused screening and information for high-risk groups could end the epidemic, experts say.

BBC: Campaign poster

We would need more evidence that more than these six key, target high-risk groups that are prioritized can benefit.

CNN: Flu vaccine attitudes abroad differ from U.S.