Researchers are working on a vaccine that might one day prevent norovirus, which has made many cruise ship passengers in the United States ill.
"It is possible to prevent infection and illness with a vaccine for norovirus," said Dr. Robert Atmar, a professor of medicine and molecular virology at the Baylor College of Medicine in Houston.
A study of the vaccine showed promising results, HealthDay reported Friday.
The study included 98 people who received either the vaccine or an inactive placebo. Of the recipients of the vaccine, 70 percent were less likely to develop the stomach bug that causes cramping, diarrhea and vomiting, and were also affected by the norovirus less frequently.