The trials involved 233, 000 people who were either sick or were healthy and taking supplements for disease prevention.

这个试验涉及到233 000个病患或身体健康的人，他们都服用维生素来预防疾病。

youdao

Working together, whether on international trade, nuclear nonproliferation, or disease prevention, can yield global public goods on a massive scale.

一道工作，无论是在国际贸易、防止核扩散，还是在疾病预防方面，都有可能大规模地出产全球性公共消费品。

youdao

If you're moderately exercising for 150 minutes a week, as the Centers for Disease Control and Prevention recommends, or less than that, you're probably not an extreme athlete.

如果你像美国疾病控制与预防中心建议的那样，每周适度锻炼150分钟，或者少于150分钟，你可能就不是一个极限运动员。

youdao

Angus Nicoll of the European Center for Disease Prevention says that at this point no one knows whether the virus will become more or less virulent in the months ahead.

VOA: standard.2009.04.30

It's a good thing, too: A 2001 survey found more than half the people who watch TV say they have learned something about a disease or disease prevention from a show.

FORBES: TV's Network Know-It-Alls

Qualifying medical expenses include the costs of diagnosis, cure, mitigation, treatment, or prevention of disease, and the costs for treatments affecting any part or function of the body.

FORBES: Ask TheTaxgirl: Deducting The Cost Of Birth Control

If you are removing it for prevention of tooth decay or periodontal disease such as gingivitis, which destroys the root and makes the teeth fall out then I believe it's best at night.

WSJ: How to Be a Better Flosser