The likelihood that most people will need at least a third dose of Pfizer Inc. and BioNTech SE’s messenger RNA-based COVID-19 vaccine Comirnaty became more apparent as the companies announced data showing that a third dose provided neutralized antibody titers against the new Omicron variant, while the standard two-dose series showed significantly reduced neutralization.
The remaining question now is how effective other vaccines are against Omicron, especially amid lingering fears that the variant’s spread could