XBB1.5-adapted vaccine:
63% reduced risk of COVID-19 hospital admission
58% lower risk of COVID-19 ED/UC encounters
58% lower risk of in-person outpatient visits for COVID-19
Prior vaccination: Little, if any, current additional protection.
https://www.medrxiv.org/content/10.1101/2023.12.24.23300512v1.full.pdf