'Open Wide...'

As the U.S. presidential debates have shown, Barack Obama and John McCain can't agree on much. One rare exception: electronic health records. Obama has proposed spending $50 billion to help doctors and hospitals digitize their files and build patient databases. McCain agrees that electronic recordkeeping could lower costs and save lives—say, by helping doctors more easily recognize which patients are on dangerous drug combinations.

Their proposals are part of a larger trend to bring the medical system, which still runs on paper and pens rather than bits and bytes, into the 21st century. Many businesses, from IBM to Procter & Gamble, have embraced the Web 2.0 ideals of transparency and decentralized problem-solving—what technologists call "open source." But is it a good idea to apply those values to private health matters? Electronic health records are a step in that direction, and some experts go further, arguing that if transparency and openness can work wonders for software, it can also benefit diabetics and Parkinson's sufferers. A growing number of Web-savvy health-care practitioners are coming to a similar view: that making data about your health freely available to family, friends and doctors could enhance the quality of care.

There are a lot of reasons to be afraid of sharing your health information. In countries without a national health plan, such as the United States, insurance is the biggest. Most providers exclude pre-existing conditions from their coverage, giving people an incentive to hide early warning signs of disease. Plus, some employers might discriminate against potential hires if they're aware of a serious medical condition. And then there's the social stigma attached to illnesses like AIDS. For the most part, however, these are problems of policy. Private insurers might punish those who reveal pre-existing conditions, but that means there's something wrong with the insurance industry, not with such admissions in and of themselves.

Now that the health sector is slowly but surely beginning to embrace Web 2.0 tactics like social networking, sharing your health information with friends, family and even strangers may become an everyday occurrence. "On the one hand, you care a lot about the privacy of health information," says Peter Neupert, a vice president at Microsoft in charge of the company's health-related products. "But in order to make it valuable, you have to be able to share."

His group's signature product is HealthVault, which enables people to store their records online. Users can even sync their accounts with some medical devices, such as heart-rate monitors or weight scales, so that the data are entered automatically. The idea is to make it easier for individuals and their doctors to monitor health status.

To be sure, neither Neupert nor Microsoft advocate radical transparency, and they've taken great pains to ensure that HealthVault users have complete control over who can see what. (Even the name reinforces the idea of security.) But Neupert says that people living with chronic conditions like diabetes might benefit by opening up. "It's not just 'I've got a bad gene; I've got a bad organ'," he says. "Part of it is a function of the way you live in the world—how you eat, how you exercise. So at the end of the day, you have to address behaviors." Enlisting family, friends or other communities can help. For instance, a person with hypertension might give others access to his blood-pressure readings stored on HealthVault, so that they can help watch for danger signs. "The concept of health is a social concept," Neupert adds.