Bivalent COVID Vaccines
4 min readSep 23, 2022
The bivalent boosters (with half BA.4/BA.5 and half ancestral variant) were designed to produce antibodies and immune memory to Omicron, and have demonstrated pan-Omicron efficacy as shown in studies just released over the last few days.
Keep in mind that Pfizer and Moderna had already performed human trials in a bivalent booster with BA.1, which demonstrated both safety and efficacy. The US government asked them to…
