says there are a number of reasons why teens in particular are at risk.

VOA: standard.2010.06.24

One of the hypotheses that was being tested in this particular study was that a low-fat diet would reduce a woman's risk for breast cancer.

其中一个,在研究中被检验的假设是,低脂膳食,有助于降低妇女患乳腺癌的风险

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So, that particular sub unit vaccine was only used in people that are at high risk for acquiring Hepatitis B, that is, people that work in healthcare situations that are exposed to blood routinely as part of their job.

因此,那些特殊的亚基疫苗当时仅用于,极有可能感染乙肝的高危病人身上,也就是那些在日常工作中,频繁的接触血液的健康护理人员

耶鲁公开课 - 生物医学工程探索课程节选