Protection of COVID-19 Vaccination Against Hospitalization During the Era of Omicron BA.4 and BA.5 Predominance: A Nationwide Case-Control Study Based on the French National Health Data System.
Laura SemenzatoJérémie BottonStéphane Le VuMarie-Joëlle JabagiFrançois CuenotJérôme DrouinRosemary Dray-SpiraAlain WeillMahmoud ZureikPublished in: Open forum infectious diseases (2023)
In the era of Omicron BA.4 and BA.5 predominance, primary vaccination still conferred protection against COVID-19 hospitalization, while booster doses provided an additional time-limited protection. The second booster had no additional protection in case of infection since the first booster.