An experimental vaccine has been put to the test by U.S. students in Mexico and Guatemala to cure traveler's diarrhea, scientists reported Friday.

The vaccine is an important development as scientist have long thought that advising travelers to avoid risky food and water was the only way to avoid the germs that cause traveler's diarrhea. The research proves that the use of a vaccine can be effective. ''This is a very encouraging first step,'' said microbiologist A. Louis Bourgeois of Johns Hopkins University's Bloomberg School of Public Health, who led the study of the Swedish-developed vaccine

Air India flight attendants could be sorry if they don't lose the excess baggage. The airline is warning its male and female crew members to shape up in two months -- or else. The directive applies to overweight pilots, stewards and stewardesses.

If they don't lose the extra pounds, they may be reassigned to ground duties. One Indian newspaper, the Hindustan Times, reported that many of the older flight attendants are obese. An Air India spokesman said increasing competition means its flight crews must look trim and fit. He wouldn't say how people would be affected by the order to lose weight

An experimental vaccine has been put to the test by U.S. students in Mexico and Guatemala to cure traveler's diarrhea, scientists reported Friday.

The vaccine is an important development as scientist have long thought that advising travelers to avoid risky food and water was the only way to avoid the germs that cause traveler's diarrhea. The research proves that the use of a vaccine can be effective. ''This is a very encouraging first step,'' said microbiologist A. Louis Bourgeois of Johns Hopkins University's Bloomberg School of Public Health, who led the study of the Swedish-developed vaccine

A new report from Harvard discounts the widely held belief that computer use causes carpal tunnel syndrome.

A Special Health Report from Harvard Medical School says "carpal tunnel syndrome is caused by the compression of the median nerve in the wrist, which may occur because of heredity, body weight, fracture, or even pregnancy -- but not computer use

World health experts are setting up a global warning system to track possible bird flu carriers and where they migrate. United Nation officials detailed the plan today at an international wildlife conference in Kenya. They say the pilot project could get started in six months and be fully operational in two years.

At least 130 people have contracted bird flu in Asia since the current outbreak began in 2003 and 67 have died, according to figures from the United Nations health agency. Those infections have occurred almost exclusively among people who have had some documented contact with chickens. Health officials are concerned the virus will sweep across the world if it mutates into a form that can spread easily from human to human