41.   Other vaccines now used to prevent common diseases are much safer, Fauci said.

42.   Prempro is a combination of Premarin and a progesterone, used to prevent Premarin from overstimulating and causing cancer in the uterus.

43.   ReoPro is used to prevent bleeding in high-risk patients during and after an angioplasty, a surgical procedure to clear blocked arteries.

44.   Similarly, the technology could be used to prevent piracy of digital music, and could give recording companies the confidence to sell songs and albums over the Internet.

45.   Silica, or silicon dioxide, is a colorless, odorless mineral frequently used to prevent powdered substances, such as pharmaceuticals, from clumping.

46.   Tamoxifen, marketed by Zeneca Pharmaceuticals, is currently being used to prevent the recurrence of breast cancer, but it stimulates cell growth in other tissues.

47.   That approach worked in lawsuits against makers of the drug DES, which was used to prevent miscarriages.

48.   The advisory committee for the U.S. Food and Drug Administration is reviewing the drug for use as an add-on to existing drug combinations used to prevent organ rejection.

49.   The companies would have had a mix of fuels that their power plants would be using to prevent them from being too reliant on one.

50.   The Christian group said the measure could be used to prevent students from speaking out against homosexuality.