“By mid-April, 2023, individuals previously vaccinated only with wild-type vaccines had little protection against #COVID19 including hospital admission. A #BNT162b2 BA.4/5 #bivalent #booster restored protection against a range of COVID-19 outcomes, including against #XBB-related sublineages, with the most substantial protection observed against #HospitalAdmission and #CriticalIllness.” https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(23)00306-5/fulltext https://bird.makeup/users/19joho/statuses/1717339296904913233