Prior to the new study, little was known about the risks of getting directly infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said.

研究人员说，在这项新研究之前，人们对于在飞机上直接感染常见的呼吸道病毒，如流感或普通感冒的风险知之甚少。

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To evaluate the risks of infection, the study team flew on 10 different flights in the U. S. during the flu season.

为了评估感染的风险，研究小组于流感季节在美国乘坐了10次不同的航班。

youdao

In addition this issue is still being investigated in France in the context of a wider study of risks factors for childhood cancers including leukaemia.

此外，这一问题也被纳入了在法国进行的一项范围更广的研究，该研究针对的是儿童期癌症(包括白血病)的风险因子。

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That study began 60 years ago in Framingham, Massachusetts, to learn more about the risks of heart attack and stroke.

VOA: special.2009.01.21

The researchers did a study of adult beliefs about the possibility of health risks to children from third-hand smoke.

VOA: special.2009.01.07

Federal Aviation Administration rules require airports to study the risks of wildlife to safe airport operations.

VOA: special.2009.04.01

Size and duration add new risks to the study, because many patients are likely to drop out before the data are in.

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His team explored these risks in a 2009 study -- and found that for both men and women, the rate of cardiac deaths in Los Angeles increased following the city's Super Bowl defeat in 1980.

CNN: Inside the mind of a sports fanatic

By combining clinical, social and research data, researchers aim to identify more effective treatments, improve drug safety, assess risks to public health and study the causes of diseases and disability.

BBC: Pipette and test tubes