Incidence and Risk Factors of COVID-19 Vaccine Breakthrough Infections: A Prospective Cohort Study in Belgium., Stouten, Veerle, Hubin Pierre, Haarhuis Freek, Van Loenhout Joris, Billuart Matthieu, Brondeel Ruben, Braeye Toon, Van Oyen Herman, Wyndham-Thomas Chloé, and Catteau Lucy , Viruses, 2022 Apr 13, Volume 14, Issue 4, (2022)