Compu Gen <i>E. Coli</i> (IMAGE) Washington University School of Medicine Caption People with blood group A are more likely to develop severe diarrhea when infected with a kind of <i>E. coli</i> (shown in a computer-generated image above) than people with blood group O or B. The findings could potentially lead to a vaccine to help protect people living in or visiting developing countries. Credit ALISSA ECKERT AND JENNIFER OOSTHUIZEN/CDC Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.