The Conseil Supérieur des Maladies Infectieuses has not issued any new recommendations for autumn 2023.
Covid-19 vaccine booster recommendations concern only at-risk individuals and healthcare workers.
See details -in French- at https://sante.public.lu/fr/espace-professionnel/recommandations/conseil-maladies-infectieuses/covid-19.html (CSMI recommendation of September 26, 2023).