From WebMD:Researchers have developed a skin patch that prevents the curse of many trips abroad: travelers’ diarrhea.
In a study of more than 150 travelers to Mexico and Guatemala, the novel vaccine cut the risk of moderate to severe diarrhea by 75%. Those who did get sick had a shorter, milder course of illness, says researcher Herbert DuPont, MD, director of the Center for Infectious Diseases at the University of Texas School of Public Health in Houston.
The patch releases a low level of the toxins of E. coli that causes Traveler's diarrhea. This stimulates the immune system of the patient. Then, when they are infected by the bacteria, they already have some preformed antibody which is protective. Neat, huh?
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