Diego Hijano, M.D., (IMAGE) St. Jude Children's Research Hospital Caption First author Diego Hijano, M.D., of the St. Jude Department of Infectious Diseases, studied how the COVID-19 vaccine reduced symptomatic and asymptomatic infections in employees. Credit St. Jude Children's Research Hospital 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.