U.S. researchers have found that four drugs used to treat HIV may also help combat prostate cancer and chronic fatigue syndrome. The drugs inhibit the replication of a virus found in some patients with those two diseases — now scientists must prove the virus actually causes them:

If further investigation proves that the retrovirus xenotropic murine leukemia virus-related virus (XMRV) causes prostate cancer or CFS, these HIV drugs may be an effective treatment for the two conditions.

In this study, researchers from the University of Utah and Emory University/Veterans Affair Medical Center tested how effectively 45 compounds used to treat HIV and other viral infections worked against XMRV. Raltegravir was the most effective, and three other drugs — L-00870812, zidovudine (ZDV or AZT), and tenofovir disoproxil fumarate (TDF) — also prevented XMRV replication.

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Pollen, pollen everywhere: 2010 is shaping up to be one of the worst allergy seasons in years. An extra cold winter and high winds may be to blame in some parts of the country. Good news is tree pollen season should subside within a few weeks, but bad news is grass and weed allergies will pick-up then:

"It's wicked bad this year," said Dr. Mona Mangat, an allergy specialist in St. Petersburg, Fla., who can't recall a worse year in the six she's worked there. "We're just overwhelmed with patients right now. We're double- and triple-booked with new patients, trying to work people in because we know how much people are suffering."

This year is especially bad in the Southeast, weather experts say, likely due to winter's unseasonably cold weather.

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A new study from the University of Iowa reveals that teens who play video games are twice as likely to have tooth decay than their non-gamer counterparts. Consuming sugary snacks and drinks while playing may be to blame. So tell your kids to put down the controllers and pick up their toothbrush:

The University of Iowa study is the latest in a growing list of video game-related ills highlighted by academics, ranging from depression and obesity to violent behavior.

The research, which focused on adolescents between the ages of 12 to 16, also found that those who had parental rules regarding screen time and diet were less likely to eat or drink while watching TV and playing games than those who did not.

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