Giving MMR booster shot (IMAGE) Parsemus Foundation Caption Nurse Fernanda A. Rodriguez-Monroy, Center of Excellence in Asthma and Allergy, Hospital Médica Sur in Mexico City, administers a Measles-Mumps-Rubella booster vaccination in a study of immune protection against COVID-19. Credit Centro de Excelencia en Asma y Alergia Usage Restrictions with caption 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.