The results show that the strategy of risk immunization proposed in this paper is very effective at the interest risk management of the default-free bond.

结果表明，所提出的风险免疫策略能有效地防范和控制无违约债券的利率风险。

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Meanwhile, it is showed by demonstration that interest risk immunization can be achieved by setting target item and adjusting asset and liability structure.

实证分析表明：通过确立目标项目，调整资产与负债结构，可以较好地实现商业银行的利率风险免疫。

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Countries should also continue to boost routine immunization coverage against polio to further strengthen population immunity and minimize the risk of any importation.

这些国家还应当继续提高脊灰常规免疫覆盖率，以进一步加强人口免疫并且尽量减少疾病输入的风险。

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The president also was to call on the departments of Health and Human Services and Agriculture to come up with a plan to improve the immunization rates for children "at risk" within 60 days.

CNN: Clinton to order immunization assessments

However, in the U.S., the current immunization schedule for this disease begins for high-risk children at two years of age and is recommended for all at age 11.

FORBES: Immunizing Bureaucrats Against Complacency