Clara Mazagatos Ateca is an epidemiologist who worked at the National Centre of Epidemiology, Carlos III Health Institute (ISCIII). Recently, she was accepted into the ECDC EPIET Fellowship programme (cohort 2024), where she works as an EPIET fellow at Sciensano (Brussels, Belgium). She holds a degree in Biochemistry (Complutense University of Madrid, 2015), a Master in Clinical Research and International Health (University of Barcelona, 2016), and a PhD in Epidemiology and Public Health (Autonomous University of Madrid, 2023). She has worked in the respiratory surveillance team at ISCIII. She has been involved in projects related with respiratory infections, both on sentinel surveillance and research, focused on influenza and COVID-19 vaccine effectiveness and impact studies, including also estimations of burden of disease based on surveillance data, both at national and European level within the I-MOVE and VEBIS networks. During the COVID-19 pandemic, she participated in surveillance activities at national level and was actively involved in the design and implementation of the integrated respiratory surveillance system in Spain (SIVIRA). She was part of the National COVID-19 vaccination effectiveness and impact monitoring group and part of the technical Working Group of the Communication Strategy for vaccination against COVID-19, coordinated by the Ministry of Health. She is an external expert for the Spanish and European Medicine Agencies.