Richard Knox

If all goes according to plan — the plan President Obama laid out on Thursday — the HIV pandemic may reach an important tipping point by the end of 2013.

"We believe that with 2 million more people in treatment, we will reach a point where the number of new infections is less than the number going into treatment," says Dr. Eric Goosby.

AIDS activists haven't always been happy with Barack Obama. But many of them were on this Worlds AIDS Day.

The president used the occasion to pledge a 50 percent increase in the number of HIV-infected people getting treatment through the President's Emergency Plan for AIDS Relief, or PEPFAR — from around 4 million now to 6 million by the end of 2013.

The United States is doing a pretty miserable job of treating people with HIV.

The latest numbers show that only 28 percent of the nation's 1.2 million HIV-infected people are getting effective treatment — that is, antiviral medications to keep the virus in check.

Turns out Howard Hughes was right. The world is a very germy place, especially public restrooms.

The reclusive billionaire, who had the world's most notorious case of so-called germophobia, would go to just about any length to avoid contamination. He wore tissue boxes on his feet. He burned his clothing if someone near him got sick. He wrote careful instructions to his staff on how to open a can of peaches without contaminating them.

When it's time to renew her son's prescriptions for medicine to treat his attention-deficit/hyperactivity disorder, Roxanne Ryan prepares for another wild goose chase.

The Philadelphia mother says she typically has to call around to 10 to 15 different pharmacies to find where the prescriptions can be filled. And when 10-year-old Sergey doesn't get his medication, he's a bundle of uncontained energy.

When the Centers for Disease Control and Prevention recommended a half-dozen years ago that preteen girls be vaccinated against human papillomavirus, two things happened.

A lot of parents and some conservative groups were jarred by the idea of immunizing young girls against a sexually transmitted virus. And uptake of the vaccine has been poor — only about a third of 13- to 17-year-old girls have gotten the full three-shot series.

Federal officials say they're making headway in their push to stem abuse of addictive painkillers. Still, they say, U.S. doctors are prescribing enough narcotics to medicate every American around the clock for a month.

The Centers for Disease Control and Prevention says drug overdoses may soon overtake car crashes as the nation's leading cause of fatal injury.

President Obama is wielding a unilateral prerogative of his office – the executive order – to get something done about a worsening shortage of essential drugs.

It's a problem that earlier this month one administration official called "a dire public health situation." Many thousands of patients with cancer, life-threatening infections, cardiac disease, severe gastrointestinal disorders and many other conditions aren't able to get the drugs they need.

It's the season for stomach bugs again. And if you want to know just how contagious those bugs can be, just ask the National Basketball Association.

A new report from the Centers for Disease Control and Prevention gives the play-by-play on an outbreak of gastrointestinal misery that afflicted as many as 13 NBA teams a year ago, spreading rapidly from player to player and from players to team staffers.

Hey guys, feeling confused about the fuss over PSA screening for prostate cancer?

Listen up. A couple of docs who ponder such medical dilemmas say there's a middle ground between business-as-usual and throwing PSA tests out altogether.