Among those who used the cleaning sprays at least four days a week, the risk of asthma was more than doubled.

在那些每四天使用一次喷雾剂人当中，患哮喘的风险将增加一倍以上。

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There is at least a vaccine against one major cause of bacterial lung infections, pneumococcus, recommended for those at risk of flu complications by many health agencies.

许多卫生机构建议，对于一些主要的肺部感染细菌，如肺炎球菌，需至少对应一种疫苗，以对抗流感并发症的风险。

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The other risk is that, when recovery eventually comes, most of the gains will go to the hotel owners-at least, those that survive.

另一个风险是，但经济最终恢复时，大部分的收入都将会归宾馆拥有者所有——至少是属于那些尚存的宾馆所有者。

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Probably only if the government were able to offer risk-adjusted returns at least equal to those they currently earn which, given traditional government procurement policies and the fact that drug-industry profits are a political hot potato, it seems unlikely to do.

ECONOMIST: Vaccines against bioterrorism

The risk of cancer spreading in those already diagnosed was cut by at least a half.

BBC: Should I take aspirin?

Even with those victories, they would still need to capture at least six of the seven Republican seats at risk.

CNN: Final day of tight race for power in U.S. Congress