Mendola, Marco, Fabio Tonelli, Francesca Stefania Garletti, Daniela Greco, Michela Fiscella, Isabella Cucchi, Maria Cristina Costa, and Paolo Carrer. “COVID-19 Impact and Vaccine Effectiveness Among Healthcare Workers of a Large University Hospital in Lombardy, Italy”. La Medicina del Lavoro | Work, Environment and Health 112, no. 6 (December 23, 2021): 453–464. Accessed January 17, 2022. https://mattioli1885journals.com/index.php/lamedicinadellavoro/article/view/11983.