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Vaccine effectiveness of the second and third COVID-19 boosters in Belgium (administered during 2022 autumn campaign), Nasiadka, L\'e9onore, Van Evercooren Izaak, Van Loenhout Joris, Stouten Veerle, Hubin Pierre, Vermeiren Elias, Billuart Matthieu, and Braeye Toon , 09/2023, Brussels, Belgium, p.8, (2023)\par \par }