Int. j. environ. res. public health Int. j. environ. res. public health Are People Optimistically Biased about the Risk of COVID-19 Infection? Lessons from the First Wave of the Pandemic in Europe McColl Kathleen Debin Marion Souty Cecile Guerrisi Caroline Turbelin Clement Falchi Alessandra Bonmarin Isabelle Paolotti Daniela Obi Chinelo Duggan Jim Moreno Yamir Universidad de Zaragoza Wisniak Ania Flahault Antoine Blanchon Thierry Colizza Vittoria Raude Jocelyn 2022 research-article