Researchers (IMAGE) Virginia Tech Caption Assistant biological sciences professor Kate Langwig (right) and her undergraduate researcher Mercedes Clark (left) and lab manager Steffany Yamada (middle) review mathematical modeling simulations to assess vaccine efficacy. Credit Virginia Tech 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.