Clinical symptoms of SARS-CoV-2 breakthrough infection during the Omicron period in relation to baseline immune status and booster vaccination-A prospective multicentre cohort of health professionals (SURPRISE study). - Kohler P; Babouee Flury B; Güsewell S; Egger T; Leal O; Brucher A; Lemmenmeier E; Meier Kleeb D; Möller JC; Ortner M; Rieder P; Ruetti M; et al. (Influenza and other respiratory viruses, 2023)