The research, published in the British medical journal The Lancet, reports that more than 70 percent of visitors to Mexico and Guatemala were protected by the vaccine, which is administered by via a patch.

One of the researchers who developed the vaccine said, "I think it's one of the most exciting new developments in travel medicine". The vaccine protects against a strain of E. coli, which is the leading cause of diarrhoea in travellers to certain areas.

Reported by Radio Netherlands

"Iomai Corp.'s experimental vaccine is a needle-free vaccine - it is an easy to apply patch and it doesn't require to be used a certain amount of days before traveling. The patch can be applied just when arriving in the country and will start protecting the body immediately," reports on traveler's diarrhea today's eMaxHealth.