Early data from a Pfizer-BioNTech (NYSE:PFE/Nasdaq:BNTX) Phase 2/3 study (NCT05472038) indicate that their updated omicron BA.4/BA.5-adapted bivalent COVID-19 booster works as intended. After drawing sera from booster recipients seven days after administration, investigators concluded that a single 30-µg booster dose increased omicron BA.4/BA.5 neutralizing antibody levels. In addition, they note that the updated vaccine potentially…