Researchers are working on a vaccine that might one day prevent norovirus, which has made many cruise ship passengers in the United States ill. A study of at the Baylor College of Medicine in Houston showed promising results. The study included 98 people who received either the vaccine or an inactive placebo. Of the recipients of the vaccine, 70% were less likely to develop the stomach bug that causes cramping, diarrhea and vomiting, and were also affected by the norovirus less frequently. The vaccine is given in two doses three weeks apart via a nasal spray. No safety issues were witnessed in the study. Side effects included stuffy nose and sneezing.
