Omicron Xbb 2024. The us food and drug administration (fda) has approved pfizer and biontech ’s supplemental biologics license application (sbla) for omicron xbb.1.5. The omicron xbb.1.5 vaccine protected comparably well, with ve of 47% (95% ci:
Xbb.1.5, an offshoot of the coronavirus’s omicron variant, can hide from parts of the immune system, but vaccines and some treatments still work. As 2023 begins, it’s causing the majority of cases in the u.s., but we aren’t seeing a surge like omicron caused last winter.